Release 0.3.31 #2850

Job	Run time
cargo +1.36 build (futures-{core, io, sink})	49s
cargo hack check --feature-powerset	15s
cargo +stable build	9s
cargo bench	19s
cargo +beta build	14s
cargo minimal-versions build	21s
cargo miri test	36s
cargo +nightly build	16s
cargo build --target thumbv7m-none-eabi	29s
cargo test (ubuntu-latest)	19s
cargo build --target thumbv6m-none-eabi	27s
cargo test (macos-latest)	20s
cargo +1.56 build	34s
cargo doc	18s
cargo test (windows-latest)	39s
cargo fmt	22s
cargo test -Z sanitizer=address	40s
cargo test (ubuntu-latest, aarch64-unknown-linux-gnu)	58s
cargo test -Z sanitizer=memory	36s
cargo test (ubuntu-latest, armv7-unknown-linux-gnueabihf)	48s
cargo test -Z sanitizer=thread	35s
cargo test (ubuntu-latest, armv5te-unknown-linux-gnueabi)	44s
cargo test (ubuntu-latest, i686-unknown-linux-gnu)	43s
	11m 31s

Provide feedback