ci: updated webpack versions

[cap-Bernardito]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

Updated webpack versions

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #536 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master     #536    +/-   ##
========================================
  Coverage   97.72%   97.72%            
========================================
  Files           6        3     -3     
  Lines         440      220   -220     
  Branches      146       73    -73     
========================================
- Hits          430      215   -215     
+ Misses         10        5     -5     

Impacted Files	Coverage Δ
...-plugin/copy-webpack-plugin/src/utils/promisify.js
...copy-webpack-plugin/copy-webpack-plugin/src/cjs.js
...py-webpack-plugin/copy-webpack-plugin/src/index.js

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