feat: support ESLint 8.x

[MichaelDeBoey]

ESLint v8.0.0 is released 🎉

devDependency compatibility with ESLint 8:

• eslint-config-prettier (Support ESLint 8.x prettier/eslint-config-prettier#200)
  • chore(CI): add tests for ESLint 8 prettier/eslint-config-prettier#201
  • Release
• eslint-plugin-prettier (Support ESLint 8.x prettier/eslint-plugin-prettier#427)
  • chore(CI): add tests for ESLint 8 prettier/eslint-plugin-prettier#428
  • Release

---

Closes #68

[AdrieanKhisbe]

@MichaelDeBoey feels like a duplicate of #69. (mentioned in #68)

Am I wrong?

[codecov-commenter]

Codecov Report

Merging #70 (2de4b36) into master (a677b11) will decrease coverage by 17.64%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##            master      #70       +/-   ##
============================================
- Coverage   100.00%   82.35%   -17.65%     
============================================
  Files            1        1               
  Lines           51       51               
============================================
- Hits            51       42        -9     
- Misses           0        9        +9     

Impacted Files	Coverage Δ
src/index.js	82.35% <0.00%> (-17.65%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update a677b11...2de4b36. Read the comment docs.

[MichaelDeBoey]

@AdrieanKhisbe Oh sorry, I didn't see that one 😕

This PR is adding some small fixes and updates ESLint dependency of the package too though.

[AdrieanKhisbe]

@MichaelDeBoey, no problem. I just closed #69 as yours is more complete

[azeemba]

Thanks for the PR!

Since there are no code changes, I am not planning on publishing a new release. Let me know if there are any concerns with that plan!