Replace JCenter repository

[jrtberlin]

The JCenter repository is deprecated and going forward read-only.

We can replace jcenter() with mavenCentral() except for the github.vatsal.easyweather library. The options are:

• look for an alternative trusted repository
• replace the library (either new lib or self-implement the functionality)
• place the dependency in our tree.

[Doomsdayrs]

Rename to "Replace JCenter repository" for proper capitalization