Merge branch 'release/0.6.7' #7

Job	Run time
Lint	26s
Xcode Build for iOS	1m 15s
Linux (old gcc, 32-bit)	2m 35s
Linux (new gcc)	4m 8s
Linux (clang + asan + llvm-cov)	4m 56s
Linux (clang + kcov)	24m 6s
Linux (gcc + code-checker + valgrind)	5m 48s
macOS (xcode llvm)	6m 1s
macOS (xcode llvm + universal)	10m 5s
macOS (clang + asan + llvm-cov)	10m 9s
Windows (old VS, 32-bit)	7m 29s
Windows (latest)	5m 48s
LLVM-Mingw	9m 3s
Android (old API/NDK)	5m 13s
Android (new API/NDK)	8m 16s
Create Release Archive	17s
	1h 45m 35s

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