Bump the Rails fork tag to the one with the truncate method reverted.
Patch the existing connection object and any future connections.

The first line of the initializer, `ActiveRecord::Base.connection.respond_to? :truncate`,
instantiates a connection object so we have to extend that object in addition to
any future connection objects.

Before:
irb(main):001:0> ActiveRecord::Base.connection.respond_to? :truncate
=> false

After:
irb(main):001:0> ActiveRecord::Base.connection.respond_to? :truncate
=> true