chore: replace _.forOwn with Object.entries().forEach

[pgrzesik]

Replace _.forOwn with Object.entries().forEach to reduce dependency on lodash.

Addresses: #7747

[codecov-commenter]

Codecov Report

Merging #8284 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #8284   +/-   ##
=======================================
  Coverage   88.18%   88.18%           
=======================================
  Files         250      250           
  Lines        9395     9398    +3     
=======================================
+ Hits         8285     8288    +3     
  Misses       1110     1110           

Impacted Files	Coverage Δ
lib/classes/PluginManager.js	96.56% <100.00%> (+0.02%)	⬆️
lib/plugins/aws/utils/findReferences.js	100.00% <100.00%> (ø)

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[medikoo]

Thank you @pgrzesik !