v1.2.0

1.2.0

• Update formatter config to allow use of defenum/2 and defenum/3 without parens.
• Enum function create_type/0 is now reversible and can be used in change in migration files.
• defenum/4 added which accepts options for creating a Postgres Enum type in a specified schema.
• Added EctoEnum.validate_enum/3 which is a helper function for validating enum values in a changeset.
• Added valid_value?/1 to the custom enum which checks if the value passed is a valid enum value.