feat: upgrade prettier to v2

[MichaelDeBoey]

Re-submission of mysticatea#39

This impacts the @mysticatea/prettier rule

I've also fixed all ESLint errors this caused & ran Prettier on the full codebase

---

BREAKING CHANGE: es5, es2015, es2016, es2017, es2018, es2019, es2020, es2021 & es2022 configs will now report for their changed default values. For more info check their release notes

[codecov-commenter]

Codecov Report

Base: 97.17% // Head: 97.17% // No change to project coverage 👍

Coverage data is based on head (343d9a4) compared to base (0f90860).
Patch coverage: 87.50% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##            alpha      #21   +/-   ##
=======================================
  Coverage   97.17%   97.17%           
=======================================
  Files          39       39           
  Lines         390      390           
=======================================
  Hits          379      379           
  Misses         11       11           

Impacted Files	Coverage Δ
lib/configs/+eslint-plugin.js	100.00% <ø> (ø)
lib/configs/_base.js	100.00% <ø> (ø)
lib/configs/_override-ts.js	100.00% <ø> (ø)
lib/configs/_override-vue.js	100.00% <ø> (ø)
lib/rules/arrow-parens.js	100.00% <ø> (ø)
lib/rules/no-instanceof-array.js	93.33% <ø> (ø)
lib/rules/no-instanceof-wrapper.js	100.00% <ø> (ø)
lib/rules/no-this-in-static.js	100.00% <ø> (ø)
lib/rules/no-use-ignored-vars.js	100.00% <ø> (ø)
lib/rules/no-useless-rest-spread.js	94.87% <66.66%> (ø)
... and 3 more

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[MichaelDeBoey]

@eslint-community/eslint-tsc @eslint-community/core-team @eslint-community/mysticatea-eslint-plugin Since this plugin is adhering the same semantic versioning policy as ESLint, this PR would need to be released in a major release I guess?

[ota-meshi]

LGTM!

[github-actions]

🎉 This PR is included in version 15.0.0-alpha.2 🎉

The release is available on:

• npm package (@alpha dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 15.0.0-beta.1 🎉

The release is available on:

• npm package (@beta dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[github-actions]

🎉 This PR is included in version 15.0.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀