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Bump codecov/codecov-action from 3 to 4 #429

Job	Run time
Ubuntu 20 GCC	45s
Ubuntu GCC ASAN	2m 17s
Ubuntu GCC UBSAN	2m 41s
Ubuntu GCC MSAN	51s
Ubuntu 20 Clang	41s
Ubuntu 20 Clang 6.0	1m 4s
Ubuntu GCC	1m 0s
Ubuntu GCC OSB	49s
Ubuntu Clang	51s
Ubuntu Clang No Zlib	53s
Ubuntu Clang No Bzip2	1m 13s
Ubuntu Clang No LZMA	50s
Ubuntu Clang No Zstd	48s
Ubuntu Clang No Pkcrypt	1m 5s
Ubuntu Clang No Winzip AES	51s
Ubuntu Clang No Encryption	1m 26s
Ubuntu Clang Compress Only	53s
Ubuntu Clang Decompress Only	53s
Ubuntu Clang OpenSSL	59s
Windows MSVC	1m 43s
Windows GCC Code Coverage	3m 28s
macOS Xcode	1m 47s
macOS Xcode Code Coverage	1m 49s
macOS Xcode LibCompression	1m 23s
macOS Xcode OpenSSL	1m 37s
	32m 37s

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