Build

Convert everything to C++ and add tests #130

Job	Run time
build (ubuntu-latest, Release, gcc, g++)	45s
build (ubuntu-latest, Release, gcc, clang++)	50s
build (ubuntu-latest, Release, clang, g++)	46s
build (ubuntu-latest, Release, clang, clang++)	52s
build (ubuntu-latest, Debug, gcc, g++)	25s
build (ubuntu-latest, Debug, gcc, clang++)	35s
build (ubuntu-latest, Debug, clang, g++)	25s
build (ubuntu-latest, Debug, clang, clang++)	35s
build (macos-latest, Release, gcc, g++)	48s
build (macos-latest, Release, gcc, clang++)	41s
build (macos-latest, Release, clang, g++)	38s
build (macos-latest, Release, clang, clang++)	35s
build (macos-latest, Debug, gcc, g++)	29s
build (macos-latest, Debug, gcc, clang++)	28s
build (macos-latest, Debug, clang, g++)	29s
build (macos-latest, Debug, clang, clang++)	33s
build (windows-latest, Release, gcc, g++)	1m 30s
build (windows-latest, Release, gcc, clang++)	1m 34s
build (windows-latest, Release, clang, g++)	1m 48s
build (windows-latest, Release, clang, clang++)	1m 50s
build (windows-latest, Debug, gcc, g++)	49s
build (windows-latest, Debug, gcc, clang++)	1m 30s
build (windows-latest, Debug, clang, g++)	1m 3s
build (windows-latest, Debug, clang, clang++)	1m 3s
	21m 1s

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