Adjust package.json

These should be quite minor changes.
oh, well, we should probably move to semantic versioning anyway and just start incrementing 4.5.1, 4.5.2, 4.5.3, etc.  

@honestbleeps concern about 4.5.0.0 vs 4.5.0 (and .1 and .2) is that browsers, browser stores, and reddit's version correctly identify that it's a later version.