build(cmake): mp-units-config.cmake file added with explicit dependencies

Addresses some of the issues mentioned in #156.

cmake/mp-units-config.cmake.in

@@ -0,0 +1,26 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2018 Mateusz Pusz
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+include(CMakeFindDependencyMacro)
+find_dependency(fmt)
+find_dependency(Microsoft.GSL)
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake")

src/CMakeLists.txt

@@ -105,4 +105,4 @@ install(DIRECTORY include/units
 )
 
 # generate configuration files and install the package
-configure_and_install(../cmake/common/simple-config.cmake.in mp-units SameMajorVersion)
+configure_and_install(../cmake/mp-units-config.cmake.in mp-units SameMajorVersion)

test_package/conanfile.py

@@ -25,7 +25,7 @@ import os
 
 class TestPackageConan(ConanFile):
     settings = "os", "compiler", "build_type", "arch"
-    generators = "cmake"
+    generators = "cmake", "cmake_find_package"
     
     def build(self):
         cmake = CMake(self)