Fix panic on &str to CString conversion

version: 0.32.5 -> 0.33.0

version: 0.32.4 -> 0.32.5

version: 0.32.3 -> 0.32.4

version: 0.32.2 -> 0.32.3

version: 0.32.1 -> 0.32.2

version: 0.32.0 -> 0.32.1

version: 0.31.0 -> 0.32.0

Bump version to 0.31.0

Bump version to 0.30.0.