Add localhost license support for TasteWP

[TobiasBg]

https://tastewp.com/ is a service similar to instawp.com, which allows setting up test sites.

It would be nice to have this added to the localhost license detection, so that activations there don't count towards production sites.

The domain pattern seems to be *.sN-tastewp.com where N is a digit.

https://freemius.com/help/documentation/selling-with-freemius/license-utilization/ should also be updated if this suggestion is added.