feat: migrate to webpack v5

[anshumanv]

What kind of change does this PR introduce?

feat

Did you add tests for your changes?
updated existing, will be adding more in future

If relevant, did you update the documentation?
yet to

Summary
Make the plugin compatible with webpack v5

Does this PR introduce a breaking change?
yep, dropped support for old versions

Other information

[codecov]

Codecov Report

Merging #177 (36c5ee3) into master (9c308c1) will increase coverage by 31.54%.
The diff coverage is 86.30%.

@@             Coverage Diff             @@
##           master     #177       +/-   ##
===========================================
+ Coverage   56.99%   88.54%   +31.54%     
===========================================
  Files           3        3               
  Lines         193      192        -1     
  Branches       37       39        +2     
===========================================
+ Hits          110      170       +60     
+ Misses         66       20       -46     
+ Partials       17        2       -15     

Impacted Files	Coverage Δ
src/plugin.js	84.09% <86.30%> (+68.36%)	⬆️

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[alexander-akait]

Now:

• Resolve issues - fix and add tests or close
• let's add yarn and pnpm support and test them, you can install yarn/pnpm globally in github actions