v0.11.1 (type stubs and outlook fixes)

This release contains mostly bug fixes related to Outlook-specific rendering (courtesy of @bvallant) and python typing stubs (by @xoudini).

• fix incorrectly closed <v:rect> tag for Outlook (Bernhard Vallant)
• fix order of <v:fill> and <v:textbox> tags for mj-section with background in outlook (Bernhard Vallant)
• add typing stubs for public interface (Dan Lindholm)
• declare support for Python 3.13
• accept also css_inline >= 0.14