Create local rule to validate isMounted usage in useAsyncEffect

[grahamlangford]

Context

• We use https://www.npmjs.com/package/use-async-effect throughout the Extension
• The callback function has an isMounted function arg
• It is easy to forget to invoke isMounted when working with useAsyncEffect
• We should create a local eslint rule to ensure we remember to invoke isMounted

[fregante]

This might also be possible via types. It was annoyance for me too:

• Require parameters in functions sindresorhus/type-fest#484

Side note: components should prefer cancelling work in progress wherever possible (which is rarely possible, actually) https://legacy.reactjs.org/blog/2015/12/16/ismounted-antipattern.html