version to 0.30.0
version to 0.30.0

* Remove render logic from the sinatra runner; switch to always using template source #161
* cache template name extensions at the template source #162
* rework template source api for querying about configured engines #163
* update test runner render args to conform to new render API #164
* add source render/partial methods to the view handler and runners #165
* template source: rename `default_template_source` engine option #166

/cc @jcredding

redding/deas,redding/deas