feat: change the timestamp resolution to microseconds #1416

Job	Run time
Xcode Build for iOS	57s
Linux (old gcc, 32-bit)	1m 15s
Lint	17s
Linux (new gcc)	6m 46s
Linux (clang + asan + llvm-cov)	7m 52s
Linux (clang + kcov)	25m 6s
Linux (gcc + code-checker + valgrind)	6m 14s
macOS (xcode llvm)	10m 36s
macOS (xcode llvm + universal)	19m 51s
macOS (clang + asan + llvm-cov)	18m 46s
Windows (old VS, 32-bit)	11m 51s
Windows (latest)	9m 47s
LLVM-Mingw	13m 51s
Android (old API/NDK)	3m 58s
Android (new API/NDK)	5m 51s
Create Release Archive	0s
	2h 22m 58s

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