Force Eslint version 8.57.0

[pakaoraki]

Eslint 9 seams to need a complete config rewrite: I tried to migrate the config file to version 9, but I'm not very familiar with it.
In the meantime, we can use the last stable version of Eslint 8 to keep process working.

[stuarthayhurst]

I'm guessing it's not worth using a package lock file for 2 packages? If that's the case, I agree with this, as it keeps things working for now :)

[matdave]

I work on many node-based projects, and would argue that the lack of a package / package lock file is the exact cause of this issue. Adding one to the repo would help with signalling a unified version to test against and run locally.

[stuarthayhurst]

I work on many node-based projects, and would argue that the lack of a package / package lock file is the exact cause of this issue. Adding one to the repo would help with signalling a unified version to test against and run locally.

I mean I don't see why we can't supply the files if it's worthwhile, but the issue seemed to be more that we didn't specify a version, not how we specified a version

[pakaoraki]

I'm sorry because I'm not very familiar with workflow and I didn't really think about package lock file. If it's ok, we can maybe merge this as a temporary fix for the current PR and improve this later.