Overview of changes in 1.49.1
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* Only recompute log attrs when needed
* Validate log attrs
* Fix conformance issues in Thai and Indic linebreaking
* Add pango_attr_break to support customizing line and word breaks
* Add font-dependent baseline shifts and sizing for super- and subscripts
* Improve hyphenation support
* pango-view: Visualize caret positions and slopes
* pango-view: Show glyph rects
* pango-view: Make --annotate easier to use
* Add pango_layout_get_caret_pos to support sloped carets
* Improve caret positioning for ligatures
* Better under- and overline placement
* layout: Allocate a bit less
* layout: Fix cluster extents with rise
* Add pango_layout_iter_get_run_baseline
* Add pango_glyph_string_index_to_x_full
* coretext: Set size on font descriptions
* Add color information to PangoGlyphVisAttr