Remove Regex dependency #443

Job	Run time
cargo-deny (advisories)	19s
lint	32s
cargo-deny (bans licenses sources)	14s
aarch64-apple-darwin / build	37s
aarch64-apple-darwin-nightly / build	32s
aarch64-apple-ios / build	39s
aarch64-unknown-linux-gnu / build	42s
aarch64-unknown-linux-musl / build	1m 27s
arm-linux-androideabi / build	34s
armv7-linux-androideabi / build	33s
i686-pc-windows-gnu / build	3m 14s
i686-pc-windows-msvc / build	2m 9s
i686-unknown-linux-gnu / build	46s
i686-unknown-linux-musl / build	1m 33s
msrv-aarch64-apple-darwin / build	51s
msrv-arm-linux-androideabi / build	1m 0s
msrv-x86_64-unknown-freebsd / build	1m 12s
msrv-x86_64-pc-windows-msvc / build	1m 34s
msrv-x86_64-unknown-linux-gnu / build	56s
msrv-x86_64-unknown-linux-musl / build	1m 17s
msrv-x86_64-unknown-netbsd / build	55s
x86_64-apple-darwin / build	43s
x86_64-pc-windows-gnu / build	2m 35s
x86_64-pc-windows-msvc / build	2m 3s
x86_64-pc-windows-msvc-nightly / build	1m 35s
x86_64-unknown-freebsd / build	29s
x86_64-unknown-linux-gnu / build	1m 3s
x86_64-unknown-linux-gnu-nightly / build	50s
x86_64-unknown-linux-musl / build	1m 1s
x86_64-unknown-netbsd / build	31s
	32m 26s

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