I have uploaded mintty 3.1.0 with the following changes:
* Image display support.
* Graphic image output support (iTerm2).
* Fixed Sixel image management (#929).
* Fixed premature discarding of partially scrolled-out image.
* Glyph checking (OSC 7771) considers FontChoice.
* Fixed AltGr handling for AutoHotKey (#932).
* Flush notification to handle auto-repeat click on scrollbar.
* Adjust row spacing ("Leading") for high DPI monitors (#777).
* Meta-script names "CJK" and "Private" for FontChoice (#928, #943,
* Adjusted default value CharNarrowing from 80 to 75 (#922).
* Collect font warnings into one popup message.