Build

compatibility with Swift Package Manager #556

Job	Run time
Ubuntu 20 GCC	41s
Ubuntu GCC ASAN	2m 17s
Ubuntu GCC UBSAN	2m 15s
Ubuntu GCC MSAN	49s
Ubuntu 20 Clang	41s
Ubuntu 20 Clang 6.0	59s
Ubuntu GCC	48s
Ubuntu GCC OSB	47s
Ubuntu Clang	57s
Ubuntu Clang No Zlib	54s
Ubuntu Clang No Bzip2	59s
Ubuntu Clang No LZMA	55s
Ubuntu Clang No Zstd	55s
Ubuntu Clang No Pkcrypt	53s
Ubuntu Clang No Winzip AES	41s
Ubuntu Clang No Encryption	41s
Ubuntu Clang Compress Only	48s
Ubuntu Clang Decompress Only	49s
Ubuntu Clang OpenSSL	54s
Windows MSVC	3m 32s
Windows GCC Code Coverage	6m 5s
macOS Xcode	43s
macOS Xcode Code Coverage	56s
macOS Xcode LibCompression	49s
macOS Xcode OpenSSL	55s
	31m 43s

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