Upgrade deps, bump MSRV to 1.70, bump to 6.0.0 #127

Job	Run time
cargo-deny	15s
Rustfmt [Formatter]	10s
Compile (x86_64-unknown-linux-musl)	9s
Clippy [Linter] (ubuntu-latest)	9s
Compile (wasm32-wasi)	6s
Clippy [Linter] (windows-latest)	1m 30s
Clippy [Linter] (macos-latest)	28s
Test Suite (ubuntu-latest, 1.7)	10s
Test Suite (ubuntu-latest, stable)	13s
Test Suite (ubuntu-latest, nightly)	18s
Test Suite (windows-latest, 1.7)	25s
Test Suite (windows-latest, stable)	1m 1s
Test Suite (windows-latest, nightly)	49s
Test Suite (macos-latest, 1.7)	6h 0m 1s
Test Suite (macos-latest, stable)	32s
Test Suite (macos-latest, nightly)	36s
	6h 6m 52s

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