build

Migrate to munit form cunit #565

Job	Run time
build-cross (x86_64-w64-mingw32)	1m 16s
build-windows (x86)	1m 15s
build (ubuntu-22.04, gcc, autotools)	38s
build-cross (i686-w64-mingw32)	1m 36s
build-windows (x64)	52s
build (ubuntu-22.04, gcc, cmake)	42s
build (ubuntu-22.04, clang, autotools)	36s
build (ubuntu-22.04, clang, distcheck)	1m 14s
build (ubuntu-22.04, clang, cmake)	1m 14s
build (macos-12, gcc, autotools)	1m 9s
build (macos-12, gcc, cmake)	1m 16s
build (macos-12, clang, autotools)	1m 17s
build (macos-12, clang, cmake)	1m 14s
	14m 19s

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