extend: Add extend config key prefix to avoid

[BenjD90]

No description provided.

[codecov]

Codecov Report

Merging #27 (a5575ca) into master (5252bbf) will increase coverage by 0.42%.
Report is 1 commits behind head on master.
The diff coverage is 96.66%.

❗ Current head a5575ca differs from pull request most recent head 42821f2. Consider uploading reports for the commit 42821f2 to get more accurate results

@@            Coverage Diff             @@
##           master      #27      +/-   ##
==========================================
+ Coverage   96.39%   96.82%   +0.42%     
==========================================
  Files           1        1              
  Lines         111      126      +15     
  Branches       35       39       +4     
==========================================
+ Hits          107      122      +15     
  Misses          2        2              
  Partials        2        2              

Files	Coverage Δ
src/index.ts	96.82% <96.66%> (+0.42%)	⬆️

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