Rename `default_features` to `default-features` #1114

Job	Run time
check	54s
check-docs	49s
cargo-hack	1m 22s
cargo-public-api-crates	49s
cargo-deny check (advisories)	26s
cargo-deny check (bans licenses sources)	24s
style	14s
test-versions (stable)	1m 33s
test-msrv	2m 54s
test-versions (beta)	1m 28s
test-versions (nightly)	1m 11s
	12m 4s

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