PDF toBuffer fix

[diffusi-on]

No description provided.

[diffusi-on]

Fix PDF file toBuffer method

[codecov]

Codecov Report

Merging #46 into master will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master      #46   +/-   ##
=======================================
  Coverage   86.77%   86.77%           
=======================================
  Files           7        7           
  Lines         257      257           
  Branches       73       73           
=======================================
  Hits          223      223           
  Misses         24       24           
  Partials       10       10           

Impacted Files	Coverage Δ
src/classes/generator.js	84.57% <0.00%> (ø)

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[rimiti]

Thanks for your contribution.