Use the same regex as mysqljs for changed rows

[KunZhou-at]

For INSERT ... ON DUPLICATE KEY UPDATE queries, the changed rows the EOF packet is named Duplicates instead of Changed. Here is the a sample message:

Records: 4  Duplicates: 0  Warnings: 0

I propose using the regex from the mysqljs project which also handles this situation.

[wellwelwel]

Thanks, @KunZhou-at 🚀

Can you include a test for these variations? Also, rebasing would be great for coverage tests 🙋🏻‍♂️

[codecov]

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All modified and coverable lines are covered by tests ✅

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@@            Coverage Diff            @@
##             master    #2518   +/-   ##
=========================================
  Coverage          ?   90.25%           
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  Files             ?       69           
  Lines             ?    14032           
  Branches          ?     1330           
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  Hits              ?    12664           
  Misses            ?     1368           
  Partials          ?        0           

Flag	Coverage Δ
compression-0	90.25% <100.00%> (?)
compression-1	90.25% <100.00%> (?)
tls-0	89.71% <100.00%> (?)
tls-1	90.05% <100.00%> (?)

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