Fix parse errors when single quotes are present in a table name

[sdispater]

Fixes #70

[codecov-io]

Codecov Report

Merging #71 into master will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           master      #71   +/-   ##
=======================================
  Coverage   91.58%   91.58%           
=======================================
  Files          10       10           
  Lines        2164     2164           
=======================================
  Hits         1982     1982           
  Misses        182      182

Impacted Files	Coverage Δ
tomlkit/parser.py	96.15% <100%> (ø)	⬆️

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