bump pytest_mozwebqa to v1.1 to gain support for --skipurlcheck

Bumping the version number of pytest-mozwebqa to 1.1 so we can gain the <code>--skipurlcheck</code> flag.

This change only effects our Selenium tests; the default behavior of pytest-mozwebqa is to do a schema check of <code>--baseurl</code>. Ultimately because we're testing against <code>about:healthreport</code> we need this functionality.

https://github.com/davehunt/pytest-mozwebqa/blob/master/CHANGELOG.md#11