feat: next major release

[snitin315]

What kind of change does this PR introduce?
feature

Did you add tests for your changes?
Yes
If relevant, did you update the documentation?
Yes
Summary
Prepare for the next major version.

Does this PR introduce a breaking change?
Yes

Other information
Keep it open until all breaking changes are done.

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (f7977af) 90.59% compared to head (6ee2f45) 90.72%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4066      +/-   ##
==========================================
+ Coverage   90.59%   90.72%   +0.12%     
==========================================
  Files          22       22              
  Lines        1702     1703       +1     
  Branches      491      491              
==========================================
+ Hits         1542     1545       +3     
+ Misses        160      158       -2     

Files	Coverage Δ
packages/webpack-cli/src/webpack-cli.ts	92.64% <90.00%> (+<0.01%)	⬆️

... and 1 file with indirect coverage changes

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