fix(imagemin): should use ./index.js instaed of . for esm

[JounQin]

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🦋 Changeset detected

Latest commit: dedb580

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@pkgr/imagemin	Patch

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[codecov]

Codecov Report

Merging #222 (3c24d07) into master (5e41496) will not change coverage.
The diff coverage is n/a.

❗ Current head 3c24d07 differs from pull request most recent head dedb580. Consider uploading reports for the commit dedb580 to get more accurate results

@@            Coverage Diff            @@
##            master      #222   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files            2         2           
  Lines           43        43           
  Branches        16        16           
=========================================
  Hits            43        43           

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