`arc lint --everything`
Make sure Electrum ABC works: `cd electrum && ./electrum-abc`
Check the `Help > Report Bug` menu now points to the Bitcoin-ABC repo
Make sure the build toolchains work:
```
cd electrum
contrib/build-wine/build.sh
contrib/build-linux/appimage/build.sh
contrib/build-linux/srcdist-docker/build.sh
```