fix(webpack-plugin): add web as a target for the renderer process

[malept]

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• The changes have sufficient test coverage (if applicable).
• The testsuite passes successfully on my local machine (if applicable).

Summarize your changes:

Fixes #2284

[codecov]

Codecov Report

Merging #2285 (6567197) into master (7bbff3a) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2285   +/-   ##
=======================================
  Coverage   75.59%   75.59%           
=======================================
  Files          74       74           
  Lines        2200     2200           
  Branches      413      413           
=======================================
  Hits         1663     1663           
  Misses        421      421           
  Partials      116      116           

Impacted Files	Coverage Δ
packages/plugin/webpack/src/WebpackConfig.ts	97.59% <ø> (ø)

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