7.0.4

This maintenance release of the 7.0.x series primarily addresses a class loading regression introduced in the 7.0.3 release. The following tickets have been resolved:

• MONGOID-4749 belongs_to :name, class_name: '::SomeClass' raises an exception
• MONGOID-4750 Association definitions can trigger autoloading and cause NameError's
• MONGOID-4742 String#numeric? can return values other than true & false
• MONGOID-4743 String#numeric? incorrectly uses ^ and $ anchors and groups