Update dependencies & bump MSRV #916

Job	Run time
Clippy	42s
Build+test (stable, ubuntu-latest)	1m 32s
Build+test (beta, ubuntu-latest)	1m 43s
Clippy (Nightly)	40s
Build+test (nightly, ubuntu-latest)	1m 36s
Build+test (macos-latest, stable)	2m 5s
Build+test (windows-latest, stable)	4m 25s
Check for documentation errors	12s
Format	11s
Check minimum versions of direct dependencies	16s
msrv (ubuntu-latest)	11s
Check semver compatibility	2m 27s
msrv (macos-latest)	16s
msrv (windows-latest)	46s
	17m 2s

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