Merge pull request #42 from nyurik/fix-casting #67

Job	Run time
integer-encoding-rs (tokio_async, windows-latest)	48s
integer-encoding-rs (futures_async, windows-latest)	1m 12s
integer-encoding-rs (futures_async, ubuntu-latest)	19s
integer-encoding-rs (macos-latest)	16s
integer-encoding-rs (tokio_async, macos-latest)	18s
integer-encoding-rs (futures_async, macos-latest)	19s
integer-encoding-rs (tokio_async, ubuntu-latest)	25s
integer-encoding-rs (windows-latest)	56s
integer-encoding-rs (ubuntu-latest)	19s
	4m 52s

Provide feedback