fix(deps): update rust crate itoa to v1.0.15 #377

Job	Run time
cargo fmt --all -- --check	6s
cargo check (ubuntu-latest)	8s
cargo clippy -- -D warnings (ubuntu-latest)	8s
cargo check (macOS-latest)	19s
cargo clippy -- -D warnings (macOS-latest)	17s
Code Coverage (ubuntu-latest, unix)	1m 54s
cargo check (windows-latest)	1m 20s
cargo clippy -- -D warnings (windows-latest)	1m 14s
Code Coverage (macos-latest, macos)	2m 2s
Code Coverage (windows-latest, windows)	5m 56s
GNU test suite	25s
cargo test (ubuntu-latest)	31s
cargo test (macOS-latest)	1m 54s
cargo test (windows-latest)	3m 48s
	20m 2s

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