Added version number to package.json (#263)
Added version number to package.json (#263)

### Description

Catapult (the internal tool we use to release Firebase JavaScript libraries) now works without the `0.0.0` version placeholder in the `package.json` file. So, we can finally add the actual version numbers back into this file.

### Code sample

N/A
firebase/firebase-tools,lguzzon/firebase-tools,firebase/firebase-tools,firebase/firebase-tools,firebase/firebase-tools,firebase/firebase-tools,lguzzon/firebase-tools