Issue #864: Address failed Travis build by adding 'default' to textdomains.
Issue #864: Address failed Travis build by adding 'default' to textdomains.

In phpcs.xml, add 'default'
And remove the @codingStandardsIgnoreLine tags.

GoogleForCreators/web-stories-wp,GoogleForCreators/web-stories-wp,GoogleForCreators/web-stories-wp,GoogleForCreators/web-stories-wp,GoogleForCreators/web-stories-wp