refactor: Replace _.isNil(value) with value == null

[wingkwong]

Addresses: #7747

[codecov-commenter]

Codecov Report

Merging #7809 into master will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #7809   +/-   ##
=======================================
  Coverage   88.18%   88.18%           
=======================================
  Files         245      245           
  Lines        9305     9305           
=======================================
  Hits         8206     8206           
  Misses       1099     1099           

Impacted Files	Coverage Δ
...s/package/compile/events/apiGateway/lib/apiKeys.js	94.73% <100.00%> (ø)
lib/plugins/aws/provider/awsProvider.js	92.72% <100.00%> (ø)
lib/plugins/plugin/install/install.js	98.61% <100.00%> (ø)

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[medikoo]

Thank you @wingkwong !

[sashock]

technically the substitution is not equivalent,
you should have also checked against undefined
see the documentation of isNil https://lodash.com/docs/4.17.15#isNil

[medikoo]

technically the substitution is not equivalent,

@Sashok Actually it is. value == null is equivalent to value === null || value === undefined

[sashock]

You're right, I realized it after having posted :)