release: bump version to 0.3.1 #57

Job	Run time
Extract crate info	1s
Check crate version	5s
Check commit branch	2s
Create draft release	4s
Build for aarch64-linux-android	10m 33s
Build for x86_64-apple-darwin	7m 24s
Build for x86_64-unknown-linux-gnu	8m 37s
Build for aarch64-apple-darwin	6m 29s
Build for x86_64-unknown-linux-musl	8m 55s
Build for aarch64-unknown-linux-gnu	9m 1s
Build for aarch64-unknown-linux-musl	9m 9s
Build for x86_64-pc-windows-msvc	18m 40s
Build Docker image for amd64	9s
Build Docker image for arm64	10s
Build Docker multi-arch image	7s
Publish release	1s
	1h 19m 27s

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