fix: distinguish delimiters in queries from SQL comments

[wellwelwel]

Resolve #4083, already fixed from sql-escaper side in mysqljs/sql-escaper#22.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 89.94%. Comparing base (ce98d8e) to head (38ee9bc).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4084   +/-   ##
=======================================
  Coverage   89.94%   89.94%           
=======================================
  Files          86       86           
  Lines       13663    13663           
  Branches     1634     1634           
=======================================
  Hits        12289    12289           
  Misses       1374     1374           

Flag	Coverage Δ
compression-0	89.05% <ø> (ø)
compression-1	89.92% <ø> (ø)
static-parser-0	87.52% <ø> (ø)
static-parser-1	88.28% <ø> (ø)
tls-0	89.35% <ø> (ø)
tls-1	89.71% <ø> (ø)

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