For MySQL users, if their collation allows case insensitivity then allow enums to be case insensitive as well. Closes #627
Since pgsql and nodejs are both async, we'll need to add a delta to expected times when setting the updatedAt.
Removed .only from tests.
Merge pull request #794 from durango/enum-ci

For MySQL users, if their collation allows case insensitivity then allow enums to be case insensitive as well. Closes #627