fix(eslint-plugin): fix property access on undefined error

[G-Rath]

🌮

[typescript-eslint]

Thanks for the PR, @G-Rath!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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[codecov]

Codecov Report

Merging #1507 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff           @@
##           master   #1507   +/-   ##
======================================
  Coverage    95.6%   95.6%           
======================================
  Files         148     148           
  Lines        6664    6664           
  Branches     1909    1909           
======================================
  Hits         6371    6371           
  Misses        111     111           
  Partials      182     182

Impacted Files	Coverage Δ
...-plugin/src/rules/no-unnecessary-type-arguments.ts	97.82% <100%> (ø)	⬆️

[bradzacher]

typechecking is only good if your types are right - and the typescript API types are sometimes garbage.
Thanks for fixing this!