Bugfix: Term Sorter

[lindseyolson]

What does this do/fix?

• Adds a fix in the Term Sorter Plugin for the wp_localize_script() method: 3rd argument is expected to be an array, not a string
• Error is only seen locally when debug is on

Tests

Does this have tests?

• [ ] Yes
• [X] No, this doesn't need tests because it's a bugfix
• [ ] No, I need help figuring out how to write the tests.

[dpellenwood]

@lindseyolson , don't forget to add a changelog entry, too please.