* Add .github/workflows
* Fix typo
* GITHUB_BASE_REF is only for PRs
* Compute BOOST_BRANCH
* Split into lines; fix cd
* Revert "Split into lines; fix cd"
* Fix cd
* We don't want fail-fast
* Add os to matrix
* Use bash on Windows
* Split Windows setup
* Quote if expressions
* Install GCC if needed
* sudo make me a sandwich
* Use matrix.install for the apt package
* Use GITHUB_BASE_REF on Windows as well
* Use a LIBRARY environment variable
* Rename ci.yml to posix.yml
* Split ci.yml into posix.yml and windows.yml
* Use cmd for Run tests
* Remove ./, try clang-win
* Remove clang-win, not present
Peter Dimov