Dbml-sqlite

Minor Patch:
* Column defaults now preserve typing as passed along from PyDBML, whereas before they would all be rendered as a string literal in the produced DDL.
* No longer tracking builds in version control. Just grab them here.
* Bumped version of a dependency.

Dependencies bumped:
* more-itertools
* click
* coveralls

Thanks to avqpereira, 'UUID' is now a coerceable type.

See title.

CREATE INDEX statements now have newline chars to prettify output and also random name generator is no longer broken.

Patched to allow Python 3.7+