Chore: update defaults and refactor tests

[cap-Bernardito]

This PR contains a:

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

Motivation / Use-Case

Update webpack defaults
Refactor tests

Breaking Changes

Support:

• webpack: "^4.0.0 || ^5.0.0"
• node: ">= 10.13.0"

Additional Info

No

[codecov]

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@@            Coverage Diff            @@
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  Coverage          ?   90.36%           
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  Lines             ?      436           
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  Hits              ?      394           
  Misses            ?       34           
  Partials          ?        8           

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