Log Message:
libcroco: Update to 0.6.13

0.6.13
    * Visual Studio builds: Enhance security of x64 binaries
    * win32/replace.py: Fix replacing items in files with UTF-8 content
    * tknzr: support only max long rgb values
    * input: check end of input before reading a byte

0.6.12
    * Add support for Visual Studio 2017 (Chun-wei Fan)
    * Misc bug fixes

0.6.11
    * Fix regression in cr_tknzr_consume_chars (Florian Müllner)
    * Misc bug fixes

0.6.10
    * Misc bug fixes

0.6.9
    * Added Visual Studio projects (Chun-wei Fan)
    * Lots of warnings fixed (Руслан Ижбулатов)
    * Improve build system (Nuno Araujo, Ignacio Casal Quinteiro)
    * Misc bug fixes