Fix and un-allow `trivial_numeric_casts` lints #763

Job	Run time
formatting	21s
cargo clippy (android) (armv7-linux-androideabi)	1m 3s
cargo clippy (android) (aarch64-linux-android)	1m 43s
cargo check (msrv) (windows-latest)	1m 14s
cargo clippy (windows-latest)	1m 14s
cargo check (msrv) (android) (armv7-linux-androideabi)	28s
cargo clippy (android) (x86_64-linux-android)	1m 38s
cargo check (msrv) (macos-latest)	31s
cargo clippy (macos-latest)	1m 9s
cargo check (msrv) (android) (aarch64-linux-android)	50s
cargo check (msrv) (ubuntu-latest)	24s
cargo clippy (ubuntu-latest)	1m 8s
cargo check (msrv) (android) (x86_64-linux-android)	42s
cargo doc (windows-latest)	58s
cargo test (windows-latest)	1m 49s
cargo doc (macos-latest)	23s
typos	3s
cargo doc (ubuntu-latest)	17s
cargo test (macos-latest)	39s
cargo test (ubuntu-latest)	35s
	17m 9s

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