* [Allow arbitrary data to be provided for a given pattern](https://github.com/twada/empower-core/pull/6) (by [@jamestalmage](https://github.com/jamestalmage))
* trying to extract core functionalities out ([60286bbf](https://github.com/twada/empower-core/commit/60286bbfae16ab9b6f0ff33a9de13cabd3c969d4))
* just attach powerAssertContext, format it later ([319a4e9a](https://github.com/twada/empower-core/commit/319a4e9a1a64ff08fdeed17b243073d35ae6a18f))
* add event handlers to options ([12bbf0d4](https://github.com/twada/empower-core/commit/12bbf0d44023340d9b6103b8df679ac2084f9ed2))
*`modifyMessageBeforeAssert` option for compatibility ([c1ade361](https://github.com/twada/empower-core/commit/c1ade361ec4d26c9c05a8ee2c05155d0cea2c815))