chore: Start development of version 0.13 #3544

Job	Run time
cargo-deny check	19s
clippy	32s
codegen	23s
Interop Tests (ubuntu-latest)	19s
Interop Tests (macOS-latest)	20s
check (ubuntu-latest)	19s
Check MSRV	31s
Interop Tests (windows-latest)	26s
check (macOS-latest)	20s
rustfmt	15s
check (windows-latest)	25s
test (ubuntu-latest)	18s
Check unused dependencies	21s
test (macOS-latest)	20s
check-external-types	33s
test (windows-latest)	27s
semver	18s
	6m 26s

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