Current `-next` is not compatible with `elm-review` and `elm-test`

`elm-review` patches the code in a way which breaks on the current `lamdera-next`. I think @jfmengels has tried to fix this already.

`elm-test` and `elm-test-rs` use regex to find tests in the compiled code, and the new `Ax/Fx` changes break those. This is probably just a matter of making those regex laxer.

