📝 bump version to 0.8.4 #60

Job	Run time
stable Test on macOS-x64	1m 22s
stable Test on Windows-x64	3m 13s
stable Test on Linux-x64	1m 26s
stable Test on Linux-aarch64	1m 46s
stable Test on Linux-armv7	1m 38s
stable Test on Linux-loong64	1m 37s
stable Test on Linux-riscv64	1m 28s
stable Test on Android-aarch64	1m 53s
nightly Test on macOS-x64	1m 34s
nightly Test on Windows-x64	2m 45s
nightly Test on Linux-x64	1m 28s
nightly Test on Linux-aarch64	1m 39s
nightly Test on Linux-armv7	1m 37s
nightly Test on Linux-loong64	1m 41s
nightly Test on Linux-riscv64	1m 38s
nightly Test on Android-aarch64	1m 55s
	28m 40s

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