fix(eslint-plugin): type assertion in rule no-extra-parens

[armano2]

This PR adds test cases for type assertion in rule no-extra-parens and fixes issue with incorrectly reported parens in binary expressions for type assertions

((a as any) | 0) - 1

test cases covers changes added in #1369

closes #742
fixes #807

[typescript-eslint]

Thanks for the PR, @armano2!

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 #1376 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1376      +/-   ##
==========================================
+ Coverage   94.04%   94.04%   +<.01%     
==========================================
  Files         139      139              
  Lines        5975     5979       +4     
  Branches     1691     1692       +1     
==========================================
+ Hits         5619     5623       +4     
  Misses        192      192              
  Partials      164      164

Impacted Files	Coverage Δ
...ackages/eslint-plugin/src/rules/no-extra-parens.ts	96.49% <100%> (+0.26%)	⬆️

[bradzacher]

LGTM! thanks for this