Update base64 to 0.22 #1870

Job	Run time
Lint	20s
build_versions (stable)	32s
build_versions (beta)	32s
build_versions (1.61.0)	3m 26s
Docs	26s
Test	55s
cargo-deny (aarch64-apple-ios)	22s
Test (json)	47s
cargo-deny (aarch64-linux-android)	21s
Test (charset)	43s
cargo-deny (i686-pc-windows-gnu)	19s
Test (cookies)	45s
cargo-deny (i686-pc-windows-msvc)	19s
Test (socks-proxy)	45s
cargo-deny (i686-unknown-linux-gnu)	21s
Test (native-certs)	43s
cargo-deny (wasm32-unknown-unknown)	19s
Test (gzip)	48s
cargo-deny (x86_64-apple-darwin)	22s
Test (brotli)	46s
cargo-deny (x86_64-apple-ios)	21s
Test (http-crate)	56s
cargo-deny (x86_64-pc-windows-gnu)	21s
Test (http-interop)	43s
cargo-deny (x86_64-pc-windows-msvc)	20s
Test (http-crate http-interop)	44s
cargo-deny (x86_64-unknown-linux-gnu)	21s
Test (tls)	46s
cargo-deny (x86_64-unknown-redox)	19s
Test (tls, json)	49s
Test (tls, charset)	47s
Test (tls, cookies)	51s
Test (tls, socks-proxy)	46s
Test (tls, native-certs)	48s
Test (tls, gzip)	53s
Test (tls, brotli)	54s
Test (tls, http-crate)	49s
Test (tls, http-interop)	52s
Test (tls, http-crate http-interop)	58s
Test (native-tls)	48s
Test (native-tls, json)	50s
Test (native-tls, charset)	49s
Test (native-tls, cookies)	53s
Test (native-tls, socks-proxy)	46s
Test (native-tls, native-certs)	48s
Test (native-tls, gzip)	1m 2s
Test (native-tls, brotli)	48s
Test (native-tls, http-crate)	50s
Test (native-tls, http-interop)	49s
Test (native-tls, http-crate http-interop)	53s
	36m 25s

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