Add support for `impl View for Arc/Rc<impl View>` #121

Job	Run time
cargo fmt	12s
cargo clippy + test (windows-latest)	3m 11s
cargo doc (windows-latest)	5s
cargo clippy + test (macos-latest)	3m 11s
cargo doc (macos-latest)	1s
cargo clippy + test (ubuntu-latest)	2m 48s
cargo doc (ubuntu-latest)	15s
	9m 43s

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