v0.17.0

Fixed:

• segment/recognize: fix shrink_polygons
• segment/recognize: fix reinit scope (for xpath_model and auto_model)
• CI: test multiple Python versions independent of ocrd/core image
• CI: speed up build for EOL Python 3.6
• CI: chmod o+w tessdata directory of PPA/OS Tesseract
• deps-ubuntu: allow installation of PPA Tesseract to fail (for newer OS)

Changed:

• adapted to Shapely v2
• *: inherit from recognize (but override logger)
• segment*: delegate constructor instead of wrapping instance
• requires ocrd==2.48