v0.1.2

#### Features

* throw invalid character warning ([997f95df](https://github.com/janantala/qrcode.js/commit/997f95df0d8128cce33ddb425882b6279a786632))
* **Gruntfile:** include conventional-changelog ([14245abd](https://github.com/janantala/qrcode.js/commit/14245abd2bad59590684d4eeec84953c7f7ef20b))