Support SQLite as a Datastore

[kkajla12]

Is your feature request related to a problem? Please describe.
I would like to run Warrant with SQLite as the primary datastore.

Describe the solution you'd like
Warrant should support being configured to run with SQLite, so that all reads and writes are performed on a local SQLite database. The name of the database file should be configurable just like the database name for other databases (e.g. MySQL) is configurable.

Describe alternatives you've considered
N/A

Additional context
N/A

[kkajla12]

Closed by #64