fix(package): install gulp 4 from github

[levithomason]

A recent update changed the version number to an unpublished tag.

Todo

• replace satisfaction with satisfied

[codecov-io]

Codecov Report

Merging #1554 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1554   +/-   ##
=======================================
  Coverage   99.74%   99.74%           
=======================================
  Files         141      141           
  Lines        2384     2384           
=======================================
  Hits         2378     2378           
  Misses          6        6

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