Bump version to 2.13.0 (faker-ruby#2068)

* @faker.version next => @faker.version 2.13.0

* Cut 2.13.0

* Add changelog entries

* minor

Cut 2.12.0

Remove duplication

Bump version to 2.10.2

Bump version to 2.10.1

Fix changelog formatting to keep consistency

Bump version to 2.9.0

Cut 2.8.1

Update version

Cut 2.7.0