Poppler Simple Versions Save

• Update for poppler 0.72.0

• Fix #25 (updated for poppler 0.71.0)

• Support for nodejs v10

• Fix build on mac

Signature of getWordList() changed to getWordList(rawOrder = false) (see #17). Thanks to @schmidmt.

Fix compatibility issue for poppler >= 0.50.0

Add support for node v0.11 Add support for poppler 0.18