Handle Updating Apollo

[nerdsupremacist]

Since our generated code accesses Apollo API it is important that before we generate the code, we make sure that the correct version of Apollo is installed.

We could either:

1. Automatically update the version of the dependency to Apollo if out of date
2. or warn the user that they should update Apollo

I think that 1 would lead to less frustration, but 2 is more "correct" I guess?

[nerdsupremacist]

For beta.4 I decided to update automatically... But it could use some work