Add missing onPreCompile stage hook

[cgewecke]

#772

• Adds missing hook
• Moves task hooks into dedicated test

(Think this was missing because of an oversight...)

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (c6eea4b) 95.91% compared to head (e2b5be4) 95.92%.
Report is 1 commits behind head on master.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #851   +/-   ##
=======================================
  Coverage   95.91%   95.92%           
=======================================
  Files          19       19           
  Lines         980      981    +1     
=======================================
+ Hits          940      941    +1     
  Misses         40       40           

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