ModuleRequirements: add mod_form.php

[jrchamp]

Fixes #307

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.37%. Comparing base (367c973) to head (05d3a2b).
Report is 5 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #327      +/-   ##
============================================
+ Coverage     88.25%   88.37%   +0.11%     
  Complexity      737      737              
============================================
  Files            76       76              
  Lines          2274     2296      +22     
============================================
+ Hits           2007     2029      +22     
  Misses          267      267              

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