When you save your change, then Travis CI should build and upload an AppImage for you. More likely than not, some fine-tuning will still be required.
For this to work, you need to enable Travis CI for your repository as [described here](https://travis-ci.org/getting_started) __prior to merging this__, if you haven't already done so.
For this to work, you need to set up `GITHUB_TOKEN` in Travis CI for this to work; please see https://github.com/probonopd/uploadtool.
By default, qmake `.pro` files generated by Qt Creator unfortunately don't support `make install` out of the box. In this case you will get