📚 Add documentation about webpack complains

[leonardfactory]

When using import instead of import type.
Fix #46

[codecov]

Codecov Report

Merging #50 (25e9e8a) into master (890257b) will not change coverage.
The diff coverage is n/a.

❗ Current head 25e9e8a differs from pull request most recent head a397113. Consider uploading reports for the commit a397113 to get more accurate results

@@           Coverage Diff           @@
##           master      #50   +/-   ##
=======================================
  Coverage   91.59%   91.59%           
=======================================
  Files           4        4           
  Lines         119      119           
  Branches       46       46           
=======================================
  Hits          109      109           
  Misses         10       10           

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