(refactor) Improve escaping by using library

[mqus]

This is just a minor improvement for handling issues like #352 properly.

I still have to add an integration test which tests against the specific issue.

Theoretically we could implement this escaping method ourselves but we would have to keep up with dart language changes.

Another option would be to use ''' and """ or even r''' but even those can fail in the face of arbitrary queries, so a proper escaping mechanism should be better, since it comes at very little compiletime and no runtime cost.

Closes #352

• Add an integration test

[codecov]

Codecov Report

Merging #531 (a6488ab) into develop (57b4899) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff            @@
##           develop     #531   +/-   ##
========================================
  Coverage    90.06%   90.07%           
========================================
  Files           74       74           
  Lines         1852     1853    +1     
========================================
+ Hits          1668     1669    +1     
  Misses         184      184           

Flag	Coverage Δ
floor	90.42% <ø> (ø)
floor_generator	90.03% <100.00%> (+<0.01%)	⬆️

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Impacted Files	Coverage Δ
...generator/lib/misc/extension/string_extension.dart	100.00% <100.00%> (ø)
floor_generator/lib/writer/database_writer.dart	100.00% <100.00%> (ø)

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[vitusortner]

Thanks!