fix: webpack 5 wrapper handling

[guybedford]

Fixes #185 adding support for the new Webpack 5 namespace form which is a function not an object with an a property. The fix supports both webpack 4 and webpack 5 in an indirect way by creating the wrapper Object.assign(() => require('x'), { a: require('x') }), with the expression entirely evaluated virtually within the static evaluation system as a way to inform the evaluation result.

[styfle]

Thanks!

[codecov]

Codecov Report

Merging #186 (275013e) into master (9c848ca) will increase coverage by 0.12%.
The diff coverage is 100.00%.

❗ Current head 275013e differs from pull request most recent head 09600d4. Consider uploading reports for the commit 09600d4 to get more accurate results

@@            Coverage Diff             @@
##           master     #186      +/-   ##
==========================================
+ Coverage   80.18%   80.31%   +0.12%     
==========================================
  Files          13       13              
  Lines        1383     1392       +9     
  Branches      529      531       +2     
==========================================
+ Hits         1109     1118       +9     
  Misses        107      107              
  Partials      167      167              

Impacted Files	Coverage Δ
src/analyze.ts	87.68% <100.00%> (ø)
src/utils/static-eval.ts	82.46% <100.00%> (+0.46%)	⬆️
src/utils/wrappers.ts	71.73% <100.00%> (+0.31%)	⬆️

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[ijjk]

It looks like this still fails using the repo here https://github.com/sozonome/nextjs-webpack5-api-route-vercel-deployment-error and tracing .next/server/pages/api/posts.js after yarn build

The module cache/bootstrap code is also moved to a separate file in webpack 5 webpack-runtime.js, could this be causing a conflict here?

[ijjk]

Awesome, looks like it's catching it now! 🎉 🎉