Run prettier in CI

[gustavkj]

Run Prettier as part of the CI-pipeline.

Also, remove an ESLint rule which is already covered by Prettier (and otherwise turned off by eslint-config-prettier).

[coveralls]

Pull Request Test Coverage Report for Build 6835598123

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 100.0%

---

Totals
Change from base Build 6833753525:	0.0%
Covered Lines:	261
Relevant Lines:	261

---

💛 - Coveralls

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (e0328c2) 100.00% compared to head (1ef9ac9) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##            master      #382   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           11        11           
  Lines          282       282           
  Branches        64        64           
=========================================
  Hits           282       282           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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[gagoar]

Thanks!