fmdkdd

Error explainers for other checkers

2

Currently the `error-explainer` checker property is used only in the `rust` and `rust-cargo` checkers. As a starting point, these two checkers could get an explanation as well: - `javascript-eslint`. Errors...

If a related error is in a part of the buffer that's not currently visible, we should rather report it under the current error, alongside with the code line that...

Drop compatibility for Emacs versions below 24.5

10

Fix #1597. I've also dropped compatibility shims for 24.3 and 24.4.

Get rid of Cask?

5

Cask is becoming an issue in CI, since `cask install` fails with Emacs 26. See #1388, and cask/cask#371. As far as I am aware, Cask has still no officiel maintainer...