Add tests to report error on MSVC warning #386

Job	Run time
linux_checks (Debug, Default, Valgrind)	2m 1s
linux_checks (Debug, Default, Sanitizer)	1m 24s
linux_checks (Debug, ReduceBinary, Valgrind)	1m 17s
linux_checks (Debug, ReduceBinary, Sanitizer)	1m 1s
linux_checks (Release, Default, Valgrind)	1m 42s
linux_checks (Release, Default, Sanitizer)	2m 36s
linux_checks (Release, ReduceBinary, Valgrind)	1m 48s
linux_checks (Release, ReduceBinary, Sanitizer)	1m 19s
linux_checks (MinSizeRel, Default, Valgrind)	1m 43s
linux_checks (MinSizeRel, Default, Sanitizer)	2m 0s
linux_checks (MinSizeRel, ReduceBinary, Valgrind)	1m 45s
linux_checks (MinSizeRel, ReduceBinary, Sanitizer)	1m 13s
linux_gcc5_i386	2m 4s
linux_gcc4	1m 2s
linux_archs (i386)	2m 2s
linux_archs (arm32v7)	14m 59s
linux_archs (arm64v8)	14m 35s
linux_archs (ppc64le)	12m 16s
linux_archs (s390x)	12m 48s
linux_archs (riscv64)	16m 42s
linux_opts (gcc, no_fp)	41s
linux_opts (gcc, no_reader)	32s
linux_opts (gcc, no_writer)	43s
linux_opts (gcc, no_utf8)	1m 9s
linux_opts (clang, no_fp)	48s
linux_opts (clang, no_reader)	34s
linux_opts (clang, no_writer)	44s
linux_opts (clang, no_utf8)	58s
linux_tinycc	27s
macos_clang	1m 25s
codecov	41s
fuzzing	5m 32s
windows_msvc	2m 40s
	1h 53m 11s

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