Add failing test for enum support in addColumn
Fix addColumn query generation for enums in postgres.
Update sqlite addColumn function to handle enums.
Merge pull request #2512 from jeff-french/master

Fix for ENUM support in migration.addColumn with postgres dialect.
Merge remote-tracking branch 'upstream/master'
Updated dependencies
Merge pull request #2519 from janmeier/deps

Updated dependencies
Update package.json
Merge remote-tracking branch 'upstream/master'