Feature Suggestion: Use regex matching for config

[agamdua]

I noticed that there is an enhancement to the _shouldExclude en route in #3. Specifically, this line.

Would you be open to using something like https://golang.org/pkg/regexp/#Match? I am not completely familiar with Go though; please feel free to advise using a different mechanism.

Specifically, my current use case is to ignore template tables and at the moment I am doing it like:

  "pg_exclude_dbs": ["template0", "template1"],