Upgrade rust version to 1.65 #145

Job	Run time
Test on i686-unknown-linux-gnu	21m 11s
Test on ubuntu-latest	11m 6s
Bitrot check	2m 31s
Test on windows-latest	15m 33s
Test on i686-unknown-linux-gnu with beta features	20m 19s
Test on macOS-latest	14m 2s
Test on i686-unknown-linux-gnu with nightly features	23m 22s
Test on ubuntu-latest with beta features	11m 14s
Book tests	4m 1s
Test on windows-latest with beta features	16m 22s
Build target wasm32-unknown-unknown	4m 21s
Test on macOS-latest with beta features	14m 19s
Build target wasm32-wasi	5m 30s
Test on ubuntu-latest with nightly features	12m 51s
Test on windows-latest with nightly features	17m 32s
Test on macOS-latest with nightly features	14m 26s
Code coverage	41m 51s
Intra-doc links	3m 57s
Rustfmt	15s
	4h 14m 43s

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