PDFmake on NativeScript

Sample to use PDFMake on Native Script.

Adopted some code from https://github.com/kumarandena/nativescript-pdf-generation in order to provide a working sample for current NativeScript version.

PDFmake docs: https://pdfmake.github.io/docs/0.3/

Had no luck with jsPDF due to some reference error when jsPDF tries to bin atob and btoa functions.

More references:

• https://medium.com/@kumarandena/pdf-generation-in-nativescript-using-javascript-libraries-864ecf4e9a3a