Bump version to 4.5.0.
Bump version to 4.5.0.

MatthewKrey/lita,crimsonknave/lita,jimmycuadra/lita,MatthewKrey/lita,tristaneuan/lita,brodock/lita,litaio/lita,liamdawson/lita,jaisonerick/lita,tristaneuan/lita,jaisonerick/lita,litaio/lita,crimsonknave/lita,brodock/lita,liamdawson/lita,jimmycuadra/lita