wdio-sync: bump fibers version to 4

[baruchvlz]

Proposed changes

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

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

Bumps node-fiber version to 4 for node 12 support. Ref: #3895

Reviewers: @webdriverio/technical-committee

[codecov]

Codecov Report

Merging #3898 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3898   +/-   ##
=======================================
  Coverage   98.57%   98.57%           
=======================================
  Files         153      153           
  Lines        3434     3434           
  Branches      749      749           
=======================================
  Hits         3385     3385           
  Misses         44       44           
  Partials        5        5

---

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 c52193d...aa17c3e. Read the comment docs.

[christian-bromann]

👍