Refactor dependencies #55

Job	Run time
Audit	6s
Clippy	24s
Build	14s
Clippy (`tls-rustls`)	36s
Minimal Versions	1m 46s
Build (`tls-rustls`)	34s
Clippy (`tls-rustls-no-provider`)	24s
Minimal Versions (`tls-rustls`)	1m 47s
Build (`tls-rustls-no-provider`)	31s
Clippy (`tls-openssl`)	35s
Rustdoc	1m 3s
Minimal Versions (`tls-rustls-no-provider`)	1m 26s
Build (`tls-openssl`)	22s
Clippy (`--all-features`)	55s
Rustdoc with `cfg(docsrs)`	52s
Minimal Versions (`tls-openssl`)	1m 49s
Build (`--all-features`)	57s
Minimal Versions (`--all-features`)	1m 48s
Build MSRV	1m 49s
Rustfmt	19s
Build MSRV (`tls-rustls`)	1m 48s
Test	27s
Build MSRV (`tls-rustls-no-provider`)	1m 48s
Test (`tls-rustls`)	56s
Build MSRV (`tls-openssl`)	1m 49s
Test (`rustls/ring`)	33s
Build MSRV (`--all-features`)	1m 49s
Test (`tls-openssl`)	45s
Test (`--all-features`)	1m 10s
	29m 22s

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