Update to 0.10.2:

libass (0.10.2)
* API additions and some ABI changes, bumped SONAME
* Expose header field for VSFilter color mangling (GC #87)
* Add functions for explicit scaling hints (GC #6)
* Add 'type' field to ASS_Image (GC #31)
* Workaround Freetype's font size grid-fitting where appropriate
* Apply blur to both glyph and border when using opaque box
* Parser bugfixes
  * Parse angles in style as number
  * Fix fallback event formats
  * Make closing ')' optional for some tags
  * Fix crazy VSFilter behaviour for \move (GC #90)
  * Make \r fall back to line style (GC #104)
  * Parse style name like VSFilter
  * Ignore junk in nested \t tags
  * Make \clip tag arguments mandatory
* Properly handle script and language in the HarfBuzz shaper
* Allow ASS_Track and ASS_Renderer to have different ASS_Library
* Fix stroking in some rare cases
* Correctly handle @font advance (GC #94)
* Fix ascent/descent for some fonts (GC #106)
* Fix ass_step_sub to not require sorted events
* Fix blur scaling
* Don't mutate input strings (GC #88)
* Remove/change some error messages
* Fix various small memory leaks

(wiz)