v0.2.6

• Add NotProvided value to SolutionState enum for puzzles without a solution
• typo in Markup.is_markup_square
• utf-8 support for v2 files
• various fixes for diagramless

v0.2.5

• added support for puz file version 1.4

v0.2.4

add python 3.7; bump version number

v0.2.1

Added package details to puz module for programmatic detection of ver…