cmake

Add `YYJSON_WRITE_NEWLINE_AT_END` flag for JSON writer: #147 #413

Job	Run time
linux_gcc_latest	1m 25s
linux_opts (gcc, no_fp)	33s
linux_archs (i386)	1m 37s
linux_opts (gcc, no_reader)	27s
linux_checks (Debug, Default, Valgrind)	1m 17s
linux_archs (arm32v7)	11m 19s
linux_opts (gcc, no_writer)	34s
linux_checks (Debug, Default, Sanitizer)	1m 14s
linux_archs (arm64v8)	9m 29s
linux_opts (gcc, no_utf8)	56s
codecov	32s
linux_checks (Debug, ReduceBinary, Valgrind)	59s
linux_archs (ppc64le)	8m 53s
linux_opts (clang, no_fp)	37s
linux_checks (Debug, ReduceBinary, Sanitizer)	46s
linux_archs (s390x)	9m 28s
linux_opts (clang, no_reader)	37s
linux_checks (Release, Default, Valgrind)	1m 12s
linux_archs (riscv64)	10m 45s
fuzzing	5m 24s
linux_opts (clang, no_writer)	29s
linux_checks (Release, Default, Sanitizer)	1m 25s
linux_opts (clang, no_utf8)	43s
linux_checks (Release, ReduceBinary, Valgrind)	1m 4s
linux_clang_latest	1m 36s
linux_checks (Release, ReduceBinary, Sanitizer)	53s
linux_gcc4	53s
linux_checks (MinSizeRel, Default, Valgrind)	1m 9s
linux_gcc5_i386	1m 23s
linux_checks (MinSizeRel, Default, Sanitizer)	1m 17s
linux_tinycc	30s
macos_clang	1m 50s
linux_checks (MinSizeRel, ReduceBinary, Valgrind)	1m 10s
windows_msvc	1m 54s
linux_checks (MinSizeRel, ReduceBinary, Sanitizer)	1m 0s
	1h 25m 20s

Provide feedback