Log Message:
py-weasyprint: Update to 44.

Version 44
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Released on 2018-12-29.

Bug fixes:

* 742:
  Don't crash during PDF generation when locale uses commas as decimal separator
* 746:
  Close file when reading VERSION
* Improve speed and memory usage for long texts.

Documentation:

* 733:
  Small documentation fixes
* 735:
  Fix broken links in NEWS.rst