feat(eslint-plugin): create no-invalid-void-type rule

[G-Rath]

🎉

I think that this might be autofixable by replacing void with undefined, but not enough that I'd be willing to place any bets just yet 😬😂

[typescript-eslint]

Thanks for the PR, @G-Rath!

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[codecov]

Codecov Report

Merging #1847 into master will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1847      +/-   ##
==========================================
+ Coverage   94.36%   94.37%   +0.01%     
==========================================
  Files         166      167       +1     
  Lines        7608     7629      +21     
  Branches     2185     2192       +7     
==========================================
+ Hits         7179     7200      +21     
  Misses        183      183              
  Partials      246      246              

Flag	Coverage Δ
#unittest	94.37% <100.00%> (+0.01%)	⬆️

Impacted Files	Coverage Δ
...es/eslint-plugin/src/rules/no-invalid-void-type.ts	100.00% <100.00%> (ø)

[bradzacher]

not a full review, a few quick nitpicks on the doc.

---

I think we should name it a little bit clearer than the original rule.
no-invalid-void-type would be better as it:

• shows it's banning something
• shows it only applies to the void type, not the operator.

[bradzacher]

LGTM for the most part.
A few comments.

[bradzacher]

LGTM - thanks!