Webpack v5 Support

[joelgallant]

Closes #94.

See https://webpack.js.org/migrate/5/

Verified using node --trace-deprecation (yarn bin)/webpack-cli --mode=production

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• [ ] Fix regression in webpack tree shaking AJV formats code, see skipped test

[cypress[bot]]

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Test summary

17 • 0 • 0 • 0

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Run details

Project	App Config
Status	Passed
Commit	8e06a331c6
Started	Mar 13, 2021 5:51 PM
Ended	Mar 13, 2021 5:53 PM
Duration	02:14 💡
OS	Linux Ubuntu - 18.04
Browser	Electron 87

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[codecov-io]

Codecov Report

Merging #121 (5997d58) into master (47f65a8) will decrease coverage by 0.00%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #121      +/-   ##
==========================================
- Coverage   83.73%   83.72%   -0.01%     
==========================================
  Files          30       30              
  Lines        1887     1886       -1     
  Branches      448      448              
==========================================
- Hits         1580     1579       -1     
  Misses        307      307              

Impacted Files	Coverage Δ
app-config-webpack/src/index.ts	77.14% <ø> (-0.64%)	:arrow_down:
app-config-webpack/src/loader.ts	100.00% <100.00%> (ø)

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