Bump MSRV to 1.70 #997

Job	Run time
Clippy	16s
Check	13s
Rustfmt	9s
spellcheck	7s
Test Suite (ubuntu-latest, 1.70.0, 0.10.1)	13m 33s
Test Suite (ubuntu-latest, 1.70.0, 0.11.0)	13m 48s
Test Suite (ubuntu-latest, stable, 0.10.1)	12m 12s
Test Suite (ubuntu-latest, stable, 0.11.0)	12m 20s
Test Suite (ubuntu-latest, stable, master)	2m 45s
Test Suite (ubuntu-latest, nightly, 0.10.1)	12m 19s
Test Suite (ubuntu-latest, nightly, 0.11.0)	12m 30s
Test Suite (ubuntu-latest, nightly, master)	2m 53s
Test Suite (macos-13, 1.70.0, 0.10.1)	28m 30s
Test Suite (macos-13, 1.70.0, 0.11.0)	30m 1s
Test Suite (macos-13, stable, 0.10.1)	16m 34s
Test Suite (macos-13, stable, 0.11.0)	25m 3s
Test Suite (macos-13, stable, master)	4m 47s
Test Suite (macos-13, nightly, 0.10.1)	27m 5s
Test Suite (macos-13, nightly, 0.11.0)	27m 32s
Test Suite (macos-13, nightly, master)	6m 11s
Test Suite (windows-latest, 1.70.0, 0.10.1)	17m 37s
Test Suite (windows-latest, 1.70.0, 0.11.0)	20m 37s
Test Suite (windows-latest, stable, 0.10.1)	17m 45s
Test Suite (windows-latest, stable, 0.11.0)	17m 15s
Test Suite (windows-latest, stable, master)	5m 31s
Test Suite (windows-latest, nightly, 0.10.1)	18m 3s
Test Suite (windows-latest, nightly, 0.11.0)	19m 13s
Test Suite (windows-latest, nightly, master)	5m 27s
	6h 10m 16s

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