Strip out question mark and hash characters from the snippet preview …

[afercia]

Strips out any ? and # from the snippet preview URL before passing it to node-url parse().

To test:

• in the standalone example or yarn-link to wpseo:
• if testing on WordPress, make sure your wp-config.php sets the constant define( 'YOAST_FEATURE_SNIPPET_PREVIEW', true );
• if testing on WordPress, build the wpseo plugin js
• edit the snippet preview
• in the slug field, enter a slug that contains ? and # characters
• check the slug in the snippet preview is rendered correctly, without ? and # and with no missing parts

Fixes #485

[abotteram]

CR 👍

[abotteram]

Acceptance 👍