Ensure webpack still emits on errors

[agubler]

Type: bug

The following has been addressed in the PR:

• There is a related issue
• All code has been formatted with prettier
• Unit or Functional tests are included in the PR

Description:

Change configuration so that webpack still emits on errors in order to ensure that manifest plugin will correctly emit a manifest file after an error'd build.

Resolves #244

[codecov]

Codecov Report

Merging #245 into master will decrease coverage by 0.15%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #245      +/-   ##
==========================================
- Coverage   52.67%   52.52%   -0.16%     
==========================================
  Files          10       10              
  Lines         617      615       -2     
  Branches      155      155              
==========================================
- Hits          325      323       -2     
  Misses        292      292

Impacted Files	Coverage Δ
src/main.ts	90.64% <ø> (-0.11%)	⬇️
src/base.config.ts	23.16% <ø> (ø)	⬆️

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