use "wit_world" module name by default for generated bindings (#150) #151

Job	Run time
Build Python sdist	22s
Populate cache	11m 56s
Build and release (ubuntu-latest, amd64, x86_64, linux, target/release)	12m 10s
Build and release (ubuntu-latest, aarch64, aarch64, linux, --target aarch64-unknown-linux-gnu, aa...	13m 53s
Build and release (macos-latest, amd64, x86_64, macos, target/release)	9m 33s
Build and release (macos-latest, aarch64, aarch64, macos, --target aarch64-apple-darwin, aarch64-...	10m 26s
Build and release (windows-latest, amd64, x64, mingw, .exe, target/release)	20m 5s
Generate checksums	9s
Update canary release	27s
	1h 19m 1s

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