Add max-classes-per-file 1 to the rules

[aljones15]

https://eslint.org/docs/rules/max-classes-per-file

We don't use es6 classes much, but when we do we should probably enforce this rule of one class per file.

Suggestion:

"max-classes-per-file": ["error", 1]

[davidlehn]

Is this an issue in practice?

[aljones15]

I might have seen 2 classes defined in a single file (which was probably written by me), however I am trying to get consensus on if we consider 1 class per module to be good enough practice to add a rule for it.

…

On Mon, Aug 24, 2020 at 1:22 PM David I. Lehn ***@***.***> wrote: Is this an issue in practice? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#41 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AACD6CBC2H3QLEUMAHBEUPTSCKOUPANCNFSM4QJQJJ5Q> .

-- Andrew Jones