There are some rules which only affect migration files, and we cannot
enable them if we're excluding those files from being inspected.
We're also changing migrations related to the Rails/TimeZone rule
slightly because these fields were already changed afterwards, so we
aren't changing the schema.
DEPRECATION WARNING: Directly inheriting from ActiveRecord::Migration
is deprecated. Please specify the Rails release the migration was
written for:
class MigrationClass < ActiveRecord::Migration[4.2]
(called from require at bin/rails:4)
