touchAction should be used with Appium

[mgrybyk]

Proposed changes

Show better error if touchAction is used not with Appium.

[chrome  mac os x #0-0] Error: touchAction can be used with Appium only.

Types of changes

• polish

Checklist

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

Further comments

#4595

Reviewers: @webdriverio/technical-committee

[codecov]

Codecov Report

Merging #4598 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #4598      +/-   ##
==========================================
+ Coverage   99.32%   99.32%   +<.01%     
==========================================
  Files         193      193              
  Lines        5034     5036       +2     
  Branches     1080     1081       +1     
==========================================
+ Hits         5000     5002       +2     
  Misses         31       31              
  Partials        3        3

Impacted Files	Coverage Δ
packages/webdriverio/src/commands/constant.js	100% <100%> (ø)	⬆️

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[christian-bromann]

👍