fix mysqldump error

[kibitan]

fix #88

after the investigation, somehow mysqldump behavior looks changed. it output with many breaklines

INSERT INTO `users` (`id`, `string`, `email`, `integer`, `float`, `boolean`, `null`, `date`, `time`, `binary_or_blob`, `nullable_string`, `nullable_integer`) VALUES (1,'example@exa','test@example.com',1245,2.1,1,-321,NULL,NULL,'\\x92\0\0\0\0\0\0\0','abcde',NULL),
(2,'あいうえお','invalid@email',0,-23.4422,0,321,NULL,NULL,'\\x92\\x92\0\0\0',NULL,12),
(3,'+-l;a*&^%$','chikahiro@test.com',-1,21.2321,NULL,-231321,'2019-10-31','2019-10-31 16:27:21',NULL,'abc123',-123);

todo

• why it happens? make the regression test
  question: is --net-buffer-length relates? https://dev.mysql.com/doc/refman/8.0/en/mysqldump.html#option_mysqldump_net-buffer-length
• fix it

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a2d5259) 100.00% compared to head (211dd3d) 100.00%.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #92   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           25        25           
  Lines          409       409           
=========================================
  Hits           409       409           

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[codeclimate]

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