Prepare 0.12 release #1785

Job	Run time
Check Style	17s
Android	21s
linux / nightly	1m 24s
MSRV	2m 32s
linux / stable	49s
unstable features	7s
linux / beta	1m 9s
WASM	1m 3s
macOS / stable	1m 42s
windows / stable-x86_64-msvc	3m 42s
windows / stable-i686-msvc	4m 23s
windows / stable-x86_64-gnu	11m 59s
windows / stable-i686-gnu	11m 15s
feat.: default-tls disabled	54s
feat.: rustls-tls	54s
feat.: rustls-tls-manual-roots	58s
feat.: rustls-tls-native-roots	58s
feat.: native-tls	57s
feat.: default-tls and rustls-tls	55s
feat.: cookies	56s
feat.: blocking	1m 17s
feat.: gzip	1m 6s
feat.: brotli	1m 1s
feat.: deflate	1m 7s
feat.: json	1m 18s
feat.: multipart	1m 24s
feat.: stream	1m 51s
feat.: socks/default-tls	1m 12s
feat.: socks/rustls-tls	1m 5s
feat.: hickory-dns	1m 27s
Docs	1m 39s
CI is green	1s
	1h 1m 43s

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