Added support for default metric filters to the widget group

0.19.3

Bumped version to 0.19.3

Added support for regexp_like and split_part functions

Merge pull request #145 from x8lucas8x/bump-pypika-version

Bump pypika version to 0.9.0

Added Amazon Redshift and PostgreSQL support

v0.18.0

Bump version to 0.18.0

Fixed YoY references with week intervals

Merge pull request #141 from mikeengland/master

Fix bug when YoY reference is used with week dimension interval