[Fix] False positive in no-this-in-sfc

[Wesitos]

• Modified getStatelessComponent method
• Added check for functions assigned to properties (property name must be PascalCase)

Fixes #3054

[codecov-commenter]

Codecov Report

Merging #3056 (20caf10) into master (261d93a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

❗ Current head 20caf10 differs from pull request most recent head 179550b. Consider uploading reports for the commit 179550b to get more accurate results

@@           Coverage Diff           @@
##           master    #3056   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files         111      111           
  Lines        7491     7502   +11     
  Branches     2746     2755    +9     
=======================================
+ Hits         7298     7309   +11     
  Misses        193      193           

Impacted Files	Coverage Δ
lib/util/Components.js	98.98% <100.00%> (+0.02%)	⬆️

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