fix: update webpack-dev-server usage

[snitin315]

What kind of change does this PR introduce?
fix

Did you add tests for your changes?
Already present
If relevant, did you update the documentation?
No
Summary

Use the latest API, otherwise npx webpack serve will show a deprecation warning like:

Does this PR introduce a breaking change?
No

Other information
No

[codecov]

Codecov Report

Merging #2853 (6159360) into master (6bb6b7d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #2853   +/-   ##
=======================================
  Coverage   95.01%   95.01%           
=======================================
  Files          31       31           
  Lines        1704     1706    +2     
  Branches      496      497    +1     
=======================================
+ Hits         1619     1621    +2     
  Misses         85       85           

Impacted Files	Coverage Δ
packages/serve/src/index.ts	84.37% <100.00%> (+0.19%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 53622dc...6159360. Read the comment docs.