diff --git a/.drone.star b/.drone.star
deleted file mode 100644
index 0a5a8fb..0000000
--- a/.drone.star
+++ /dev/null
@@ -1,24 +0,0 @@
-# Use, modification, and distribution are
-# subject to the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE.txt)
-#
-# Copyright Rene Rivera 2020.
-
-# For Drone CI we use the Starlark scripting language to reduce duplication.
-# As the yaml syntax for Drone CI is rather limited.
-#
-#
-globalenv={}
-linuxglobalimage="cppalliance/droneubuntu1604:1"
-windowsglobalimage="cppalliance/dronevs2019"
-
-def main(ctx):
-  return [
-  linux_cxx("GCC-8", "g++", packages="g++-8", buildtype="empty-c9a1002e88", buildscript="drone", image=linuxglobalimage, environment={'B2_ARGS': 'cxxstd=98,03,11,14,1z toolset=gcc-8 cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage  -lasan -lubsan"', 'GCOVTOOL': 'gcov-8', 'DRONE_JOB_UUID': 'b6589fc6ab'}, globalenv=globalenv, privileged=True),
-  linux_cxx("GCC-4.6", "g++", packages="g++-4.6", buildtype="empty-c9a1002e88", buildscript="drone", image=linuxglobalimage, environment={'B2_ARGS': 'cxxstd=98,0x toolset=gcc-4.6 cxxflags="--coverage -DBOOST_TRAVISCI_BUILD" linkflags="--coverage"', 'GCOVTOOL': 'gcov-4.6', 'DRONE_JOB_UUID': '356a192b79'}, globalenv=globalenv, privileged=True),
-  linux_cxx("Clang-7", "g++", packages="clang++-7", llvm_os="xenial", llvm_ver="7", buildtype="empty-c9a1002e88", buildscript="drone", image=linuxglobalimage, environment={'B2_ARGS': 'cxxstd=98,03,11,14,1z toolset=clang-7 cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage -fsanitize=address,leak,undefined"', 'GCOVTOOL': 'gcov_for_clang.sh', 'DRONE_JOB_UUID': 'da4b9237ba'}, globalenv=globalenv, privileged=True),
-  linux_cxx("Clang-3.8, libc++", "g++", packages="libc++-dev", buildtype="empty-c9a1002e88", buildscript="drone", image=linuxglobalimage, environment={'B2_ARGS': 'cxxstd=03,11,14 toolset=clang-libc++ cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage -fsanitize=address,leak,undefined"', 'GCOVTOOL': 'gcov_for_clang.sh', 'DRONE_JOB_UUID': '77de68daec'}, globalenv=globalenv, privileged=True),
-    ]
-
-# from https://github.com/boostorg/boost-ci
-load("@boost_ci//ci/drone/:functions.star", "linux_cxx","windows_cxx","osx_cxx","freebsd_cxx")
diff --git a/.drone/after-success.sh b/.drone/after-success.sh
deleted file mode 100755
index 4f20f63..0000000
--- a/.drone/after-success.sh
+++ /dev/null
@@ -1,30 +0,0 @@
-#!/bin/bash
-
-# Copyright 2020 Rene Rivera, Sam Darwin
-# Distributed under the Boost Software License, Version 1.0.
-# (See accompanying file LICENSE.txt or copy at http://boost.org/LICENSE_1_0.txt)
-
-if [ "$DRONE_JOB_UUID" = "b6589fc6ab" ] || [ "$DRONE_JOB_UUID" = "356a192b79" ] || [ "$DRONE_JOB_UUID" = "da4b9237ba" ] || [ "$DRONE_JOB_UUID" = "77de68daec" ] ; then
-    mkdir -p $TRAVIS_BUILD_DIR/coverals
-    find ../../../bin.v2/ -name "*.gcda" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-    find ../../../bin.v2/ -name "*.gcno" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-    find ../../../bin.v2/ -name "*.da" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-    find ../../../bin.v2/ -name "*.no" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-    wget https://github.com/linux-test-project/lcov/archive/v1.14.zip
-    unzip v1.14.zip
-    LCOV="`pwd`/lcov-1.14/bin/lcov --gcov-tool $GCOVTOOL"
-    mkdir -p ~/.local/bin
-    echo -e '#!/bin/bash\nexec llvm-cov gcov "$@"' > ~/.local/bin/gcov_for_clang.sh
-    chmod 755 ~/.local/bin/gcov_for_clang.sh
-    echo "$LCOV --directory $TRAVIS_BUILD_DIR/coverals --base-directory `pwd` --capture --output-file $TRAVIS_BUILD_DIR/coverals/coverage.info"
-    $LCOV --directory $TRAVIS_BUILD_DIR/coverals --base-directory `pwd` --capture --output-file $TRAVIS_BUILD_DIR/coverals/coverage.info
-    cd $BOOST
-    $LCOV --remove $TRAVIS_BUILD_DIR/coverals/coverage.info "/usr*" "*/$BOOST_LIBS_FOLDER/test/*" $IGNORE_COVERAGE "*/$BOOST_LIBS_FOLDER/tests/*" "*/$BOOST_LIBS_FOLDER/examples/*" "*/$BOOST_LIBS_FOLDER/example/*" -o $TRAVIS_BUILD_DIR/coverals/coverage.info
-    OTHER_LIBS=`grep "submodule .*" .gitmodules | sed 's/\[submodule\ "\(.*\)"\]/"\*\/boost\/\1\.hpp" "\*\/boost\/\1\/\*"/g'| sed "/\"\*\/boost\/$BOOST_LIBS_FOLDER\/\*\"/d" | sed ':a;N;$!ba;s/\n/ /g'`
-    echo $OTHER_LIBS
-    eval "$LCOV --remove $TRAVIS_BUILD_DIR/coverals/coverage.info $OTHER_LIBS -o $TRAVIS_BUILD_DIR/coverals/coverage.info"
-    cd $TRAVIS_BUILD_DIR
-    gem install coveralls-lcov || echo "ERROR. Failed to install coveralls-lcov"
-    coveralls-lcov coverals/coverage.info
-fi
-
diff --git a/.drone/before-install.sh b/.drone/before-install.sh
deleted file mode 100755
index 2148ff3..0000000
--- a/.drone/before-install.sh
+++ /dev/null
@@ -1,37 +0,0 @@
-#!/bin/bash
-
-# Copyright 2020 Rene Rivera, Sam Darwin
-# Distributed under the Boost Software License, Version 1.0.
-# (See accompanying file LICENSE.txt or copy at http://boost.org/LICENSE_1_0.txt)
-
-if [ "$DRONE_JOB_UUID" = "b6589fc6ab" ] || [ "$DRONE_JOB_UUID" = "356a192b79" ] || [ "$DRONE_JOB_UUID" = "da4b9237ba" ] || [ "$DRONE_JOB_UUID" = "77de68daec" ] ; then
-    BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
-    IGNORE_COVERAGE=''
-    BOOST_LIBS_FOLDER=$(basename $REPO_NAME)
-    UBSAN_OPTIONS=print_stacktrace=1
-    LSAN_OPTIONS=verbosity=1:log_threads=1
-    BOOST=$HOME/boost-local
-    git clone -b $BOOST_BRANCH --depth 10 https://github.com/boostorg/boost.git $BOOST
-    cd $BOOST
-    git submodule update --init --depth 10 --jobs 2 tools/build tools/boostdep tools/inspect libs/filesystem
-    python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" $BOOST/libs/filesystem
-    echo "Testing $BOOST/libs/$BOOST_LIBS_FOLDER moved from $TRAVIS_BUILD_DIR, branch $BOOST_BRANCH"
-    rm -rf $BOOST/libs/$BOOST_LIBS_FOLDER || true
-    cp -rp $TRAVIS_BUILD_DIR $BOOST/libs/$BOOST_LIBS_FOLDER
-    python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" $BOOST_LIBS_FOLDER
-    git status
-    ./bootstrap.sh
-    ./b2 headers
-    ./b2 -j4 variant=debug tools/inspect/build
-    echo "using gcc ;" >> ~/user-config.jam
-    echo "using clang ;" >> ~/user-config.jam
-    echo "using clang : 3.8 : clang++-3.8 ;" >> ~/user-config.jam
-    echo "using clang : 4 : clang++-4.0 ;" >> ~/user-config.jam
-    echo "using clang : 5 : clang++-5.0 ;" >> ~/user-config.jam
-    echo "using clang : 6 : clang++-6.0 ;" >> ~/user-config.jam
-    echo "using clang : 7 : clang++-7 ;" >> ~/user-config.jam
-    echo "using clang : 8 : clang++-8 ;" >> ~/user-config.jam
-    echo "using clang : libc++ : clang++-libc++ ;" >> ~/user-config.jam
-    cd $BOOST/libs/$BOOST_LIBS_FOLDER/test/
-fi
-
diff --git a/.drone/drone.sh b/.drone/drone.sh
deleted file mode 100755
index 43cebfd..0000000
--- a/.drone/drone.sh
+++ /dev/null
@@ -1,36 +0,0 @@
-#!/bin/bash
-
-# Copyright 2020 Rene Rivera, Sam Darwin
-# Distributed under the Boost Software License, Version 1.0.
-# (See accompanying file LICENSE.txt or copy at http://boost.org/LICENSE_1_0.txt)
-
-set -e
-set -x
-export TRAVIS_BUILD_DIR=$(pwd)
-export DRONE_BUILD_DIR=$(pwd)
-export TRAVIS_BRANCH=$DRONE_BRANCH
-export VCS_COMMIT_ID=$DRONE_COMMIT
-export GIT_COMMIT=$DRONE_COMMIT
-export REPO_NAME=$DRONE_REPO
-export PATH=~/.local/bin:/usr/local/bin:$PATH
-
-if [ "$DRONE_JOB_BUILDTYPE" == "empty-c9a1002e88" ]; then
-
-echo '==================================> BEFORE_INSTALL'
-
-. .drone/before-install.sh
-
-echo '==================================> INSTALL'
-
-
-
-echo '==================================> SCRIPT'
-
-sh -c "../../../b2 -j2 $B2_ARGS"
-../../../dist/bin/inspect .. -license -copyright -crlf -end -path_name -tab -ascii -apple_macro -assert_macro -deprecated_macro -minmax -unnamed
-
-echo '==================================> AFTER_SUCCESS'
-
-. $DRONE_BUILD_DIR/.drone/after-success.sh
-
-fi
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 8d6dbb3..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,151 +0,0 @@
-# Use, modification, and distribution are
-# subject to the Boost Software License, Version 1.0. (See accompanying
-# file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-#
-# Copyright Antony Polukhin 2014-2021.
-
-#
-# See https://svn.boost.org/trac/boost/wiki/TravisCoverals for description of this file
-# and how it can be used with Boost libraries.
-#
-# File revision #10
-
-language: cpp
-os: linux
-
-# `--coverage` flags required to generate coverage info for Coveralls
-matrix:
-  include:
-    - env: B2_ARGS='cxxstd=98,03,11,14,1z toolset=gcc-8 cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage  -lasan -lubsan"' GCOVTOOL='gcov-8'
-      name: "GCC-8"
-      sudo: required # Required by leak sanitizer
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-8
-
-    - env: B2_ARGS='cxxstd=98,0x toolset=gcc-4.6 cxxflags="--coverage -DBOOST_TRAVISCI_BUILD" linkflags="--coverage"' GCOVTOOL='gcov-4.6'
-      name: "GCC-4.6"
-      addons:
-        apt:
-          sources: ubuntu-toolchain-r-test
-          packages: g++-4.6
-
-#    - env: B2_ARGS='cxxstd=98,03,11,14,1y toolset=gcc-8 cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD -fno-exceptions" linkflags="--coverage -lasan -lubsan"'
-#      name: "GCC-8, no exceptions"
-#      sudo: required # Required by leak sanitizer
-#      addons:
-#        apt:
-#          sources: ubuntu-toolchain-r-test
-#          packages: g++-8
-
-    - env: B2_ARGS='cxxstd=98,03,11,14,1z toolset=clang-7 cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage -fsanitize=address,leak,undefined"' GCOVTOOL='gcov_for_clang.sh'
-      name: "Clang-7"
-      sudo: required # Required by leak sanitizer
-      addons:
-        apt:
-          sources: llvm-toolchain-trusty-7
-          packages: clang++-7
-
-    - env: B2_ARGS='cxxstd=03,11,14 toolset=clang-libc++ cxxflags="--coverage -fsanitize=address,leak,undefined -fno-sanitize-recover=undefined -DBOOST_TRAVISCI_BUILD" linkflags="--coverage -fsanitize=address,leak,undefined"' GCOVTOOL='gcov_for_clang.sh'
-      name: "Clang-3.8, libc++"
-      sudo: required # Required by leak sanitizer
-      addons:
-        apt:
-          packages: libc++-dev
-
-###############################################################################################################
-# From this point and below code is same for all the Boost libs
-###############################################################################################################
-
-# Installing additional tools
-addons:
-  apt:
-    sources: git-core
-    packages:
-    - git
-    - python-yaml
-
-before_install:
-  # Autodetect Boost branch by using the following code: - BOOST_BRANCH=$TRAVIS_BRANCH
-  # or just directly specify it
-  - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
-
-  # Files, which coverage results must be ignored (files from other projects).
-  # Example: - IGNORE_COVERAGE='*/boost/progress.hpp */filesystem/src/*'
-  - IGNORE_COVERAGE=''
-
-  # boost-local/libs/ folder to put this library into. This may be useful, if you're for example running Travis
-  # from `Boost.DLL` repo while Boost already has `dll` and with to replace `dll` with content of`Boost.DLL`.
-  #
-  # Otherwise just leave the default value - BOOST_LIBS_FOLDER=$(basename $TRAVIS_BUILD_DIR)
-  - BOOST_LIBS_FOLDER=$(basename $TRAVIS_BUILD_DIR)
-
-  # Global options for sanitizers
-  - UBSAN_OPTIONS=print_stacktrace=1
-  - LSAN_OPTIONS=verbosity=1:log_threads=1
-  # Cloning minimal set of Boost libraries
-  - BOOST=$HOME/boost-local
-  - git clone -b $BOOST_BRANCH --depth 10 https://github.com/boostorg/boost.git $BOOST
-  - cd $BOOST
-  - git submodule update --init --depth 10 --jobs 2 tools/build tools/boostdep tools/inspect libs/filesystem
-  - python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" $BOOST/libs/filesystem
-
-  # Replacing Boost module with this project and installing Boost dependencies
-  - echo "Testing $BOOST/libs/$BOOST_LIBS_FOLDER moved from $TRAVIS_BUILD_DIR, branch $BOOST_BRANCH"
-  - rm -rf $BOOST/libs/$BOOST_LIBS_FOLDER || true
-  - mv $TRAVIS_BUILD_DIR $BOOST/libs/$BOOST_LIBS_FOLDER
-  - python tools/boostdep/depinst/depinst.py --git_args "--depth 10 --jobs 2" $BOOST_LIBS_FOLDER
-  - git status
-
-  # Adding missing toolsets and preparing Boost headers
-  - ./bootstrap.sh
-  - ./b2 headers
-  - ./b2 -j4 variant=debug tools/inspect/build
-  - |-
-    echo "using gcc ;" >> ~/user-config.jam
-    echo "using clang ;" >> ~/user-config.jam
-    echo "using clang : 3.8 : clang++-3.8 ;" >> ~/user-config.jam
-    echo "using clang : 4 : clang++-4.0 ;" >> ~/user-config.jam
-    echo "using clang : 5 : clang++-5.0 ;" >> ~/user-config.jam
-    echo "using clang : 6 : clang++-6.0 ;" >> ~/user-config.jam
-    echo "using clang : 7 : clang++-7 ;" >> ~/user-config.jam
-    echo "using clang : 8 : clang++-8 ;" >> ~/user-config.jam
-    echo "using clang : libc++ : clang++-libc++ ;" >> ~/user-config.jam
-  - cd $BOOST/libs/$BOOST_LIBS_FOLDER/test/
-
-script:
-  - sh -c "../../../b2 -j2 $B2_ARGS"
-  - ../../../dist/bin/inspect .. -license -copyright -crlf -end -path_name -tab -ascii -apple_macro -assert_macro -deprecated_macro -minmax -unnamed
-
-after_success:
-  # Copying Coveralls data to a separate folder
-  - mkdir -p $TRAVIS_BUILD_DIR/coverals
-  - find ../../../bin.v2/ -name "*.gcda" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-  - find ../../../bin.v2/ -name "*.gcno" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-  - find ../../../bin.v2/ -name "*.da" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-  - find ../../../bin.v2/ -name "*.no" -exec cp "{}" $TRAVIS_BUILD_DIR/coverals/ \;
-  - wget https://github.com/linux-test-project/lcov/archive/v1.14.zip
-  - unzip v1.14.zip
-  - LCOV="`pwd`/lcov-1.14/bin/lcov --gcov-tool $GCOVTOOL"
-  - mkdir -p ~/.local/bin
-  - echo -e '#!/bin/bash\nexec llvm-cov gcov "$@"' > ~/.local/bin/gcov_for_clang.sh
-  - chmod 755 ~/.local/bin/gcov_for_clang.sh
-
-  # Preparing Coveralls data by changind data format to a readable one
-  - echo "$LCOV --directory $TRAVIS_BUILD_DIR/coverals --base-directory `pwd` --capture --output-file $TRAVIS_BUILD_DIR/coverals/coverage.info"
-  - $LCOV --directory $TRAVIS_BUILD_DIR/coverals --base-directory `pwd` --capture --output-file $TRAVIS_BUILD_DIR/coverals/coverage.info
-
-  # ... erasing /test/ /example/ folder data
-  - cd $BOOST
-  - $LCOV --remove $TRAVIS_BUILD_DIR/coverals/coverage.info "/usr*" "*/$BOOST_LIBS_FOLDER/test/*" $IGNORE_COVERAGE "*/$BOOST_LIBS_FOLDER/tests/*" "*/$BOOST_LIBS_FOLDER/examples/*" "*/$BOOST_LIBS_FOLDER/example/*" -o $TRAVIS_BUILD_DIR/coverals/coverage.info
-
-  # ... erasing data that is not related to this project directly
-  - OTHER_LIBS=`grep "submodule .*" .gitmodules | sed 's/\[submodule\ "\(.*\)"\]/"\*\/boost\/\1\.hpp" "\*\/boost\/\1\/\*"/g'| sed "/\"\*\/boost\/$BOOST_LIBS_FOLDER\/\*\"/d" | sed ':a;N;$!ba;s/\n/ /g'`
-  - echo $OTHER_LIBS
-  - eval "$LCOV --remove $TRAVIS_BUILD_DIR/coverals/coverage.info $OTHER_LIBS -o $TRAVIS_BUILD_DIR/coverals/coverage.info"
-
-  # Sending data to Coveralls
-  - cd $TRAVIS_BUILD_DIR
-  - gem install coveralls-lcov
-  - coveralls-lcov coverals/coverage.info