Release v5.2.0 (twbs#36768)

* Bump version to 5.2.0

* Dist

* Update masthead.html

Dist

Release v4.6.1 (twbs#35272)

* Bump version to v4.6.1

* Dist

Bump version to 5.1.3.

Release v5.1.2 (twbs#35114)

Release v5.1.1 (twbs#34869)

* Prepare v5.1.1.

* Dist

Prepare v5.1.0. (twbs#34674)

Release v5.0.2 (twbs#34276)

* Bump version to v5.0.2.

* Dist

Release v5.0.1 (twbs#33972)

* Bump version to 5.0.1.

* Dist