* chore: Make sure copyright header comment includes license
* Add period at end of copyright line in checkCopyrightHeaders.js :)
* Update CHANGELOG.md
* Filter API pre-filter setup hook.
* Ensure filter API setup Promise resolves before filtering.
* Pass through wrapped filter to avoid including it twice.
* Resolve lint error.
* Fix unit test for Node v6.
* Update changelog.
* Add tests and improve behavior for errors in filter and setup filter.
* Resolve lint error.
* Update CHANGELOG.md
* Fix broken filter test in Node 6.