docs(readme): update readme for 1.0 #2342

Job	Run time
Check Style	4s
Verify hyper.h is up to date	15s
Test stable on ubuntu-latest	1m 9s
Test stable on windows-latest	1m 55s
Test stable on macOS-latest	2m 8s
Test beta on ubuntu-latest	1m 7s
features	17s
Test beta on windows-latest	1m 46s
Test C API (FFI)	22s
Test with Miri	50s
Test beta on macOS-latest	2m 1s
Test nightly on ubuntu-latest	1m 12s
Check MSRV	24s
udeps	31s
Test nightly on windows-latest	2m 6s
Test nightly on macOS-latest	2m 6s
Build docs	15s
Check exposed types	14s
CI is green	1s
	18m 43s

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