fix: support webpack chunked wrappers

[guybedford]

Fixes Webpack wrapper detection to support non-parameter wrapper IIFEs and 'use strict' in external blocks.

Resolves #201.

[codecov]

Codecov Report

Merging #205 (13c54f7) into main (61aac0a) will increase coverage by 0.04%.
The diff coverage is 100.00%.

❗ Current head 13c54f7 differs from pull request most recent head 9710c1a. Consider uploading reports for the commit 9710c1a to get more accurate results

@@            Coverage Diff             @@
##             main     #205      +/-   ##
==========================================
+ Coverage   80.54%   80.58%   +0.04%     
==========================================
  Files          13       13              
  Lines        1398     1401       +3     
  Branches      534      537       +3     
==========================================
+ Hits         1126     1129       +3     
  Misses        107      107              
  Partials      165      165              

Impacted Files	Coverage Δ
src/utils/wrappers.ts	73.68% <100.00%> (+0.85%)	⬆️

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[styfle]

Thanks!