Log Message:
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