bump version to 2.4.1 #189

Job	Run time
Miri	57s
Rust (ubuntu-latest, x86_64, stable)	50s
Rust (ubuntu-latest, x86_64, beta)	56s
Rust (ubuntu-latest, x86_64, nightly)	1m 1s
Rust (ubuntu-latest, x86_64, 1.70.0)	1m 12s
Rust (ubuntu-latest, i686, stable)	31s
Rust (ubuntu-latest, i686, beta)	33s
Rust (ubuntu-latest, i686, nightly)	25s
Rust (ubuntu-latest, i686, 1.70.0)	27s
Rust (ubuntu-latest, aarch64, stable)	31s
Rust (ubuntu-latest, aarch64, beta)	24s
Rust (ubuntu-latest, aarch64, nightly)	24s
Rust (ubuntu-latest, aarch64, 1.70.0)	28s
Rust (windows-latest, x86_64, stable)	2m 49s
Rust (windows-latest, x86_64, beta)	2m 19s
Rust (windows-latest, x86_64, nightly)	1m 59s
Rust (windows-latest, x86_64, 1.70.0)	1m 57s
Rust (windows-latest, i686, stable)	1m 30s
Rust (windows-latest, i686, beta)	49s
Rust (windows-latest, i686, nightly)	50s
Rust (windows-latest, i686, 1.70.0)	45s
Rust (windows-latest, aarch64, stable)	43s
Rust (windows-latest, aarch64, beta)	48s
Rust (windows-latest, aarch64, nightly)	47s
Rust (windows-latest, aarch64, 1.70.0)	46s
	24m 41s

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