Fix travis release deployment
Fix travis release deployment

This resolves an issue with travis release deployment where tags would
cause a release deployment even if the tag did not match the `vX.Y.Z`
format.
jwilm/alacritty,jwilm/alacritty,jwilm/alacritty,alacritty/alacritty,alacritty/alacritty,jwilm/alacritty