Bump all crates to 1.70 MSRV. (#476) #1301

Job	Run time
Check fuzz targets	54s
Run tests	4m 38s
Check rustdoc WASM target	57s
Check lint and rustfmt	3m 33s
Run JS linters	1m 40s
pre-publish checks	9s
Python tests and maturin build (3.9)	1m 31s
WASM tests	1m 19s
Python tests and maturin build (3.10)	1m 32s
Python tests and maturin build (3.11)	1m 32s
All CI stages	1s
pre-publish checks	1s
publish trustfall_filetests_macros / Did version change	13s
publish trustfall_filetests_macros / Semver	0s
publish trustfall_filetests_macros / Publish to crates.io	0s
publish trustfall_core / Did version change	8s
publish trustfall_core / Semver	0s
publish trustfall_core / Publish to crates.io	0s
publish trustfall_derive / Did version change	10s
publish python trustfall / Did version change	12s
publish trustfall_derive / Semver	0s
publish trustfall_derive / Publish to crates.io	0s
publish trustfall / Did version change	10s
publish python trustfall / macos	0s
publish python trustfall / linux	0s
publish python trustfall / windows	0s
publish python trustfall / tag the version	0s
publish python trustfall / publish python trustfall	0s
publish trustfall / Semver	0s
publish trustfall / Publish to crates.io	0s
publish trustfall_stubgen / Did version change	9s
publish trustfall_stubgen / Semver	0s
publish trustfall_stubgen / Publish to crates.io	0s
	18m 49s

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