Fix and un-allow `trivial_numeric_casts` lints (#232) #773

Job	Run time
cargo test (windows-latest)	1m 30s
cargo clippy (windows-latest)	2m 25s
formatting	24s
cargo clippy (android) (armv7-linux-androideabi)	59s
cargo test (macos-latest)	50s
cargo clippy (macos-latest)	1m 5s
cargo clippy (android) (aarch64-linux-android)	1m 48s
cargo test (ubuntu-latest)	29s
cargo clippy (ubuntu-latest)	1m 3s
cargo check (msrv) (windows-latest)	1m 17s
cargo clippy (android) (x86_64-linux-android)	1m 33s
cargo doc (windows-latest)	3m 20s
cargo check (msrv) (macos-latest)	28s
cargo check (msrv) (android) (armv7-linux-androideabi)	24s
typos	3s
cargo check (msrv) (ubuntu-latest)	22s
cargo check (msrv) (android) (aarch64-linux-android)	46s
cargo check (msrv) (android) (x86_64-linux-android)	48s
cargo doc (macos-latest)	22s
cargo doc (ubuntu-latest)	23s
	20m 19s

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