v3.4.0b6

What's Changed

• Fix for spurious rebuilds with watchdog>=2.3.0 by @dairiki in #1117
• Better input validation for the date/time formatting jinja filters by @dairiki in #1122
• Update/fix resolution of relative output path by @dairiki in #1120
• fix(cli): tighten constraints on the various Path parameters by @dairiki in #1124
• Refactor(watcher): replace Queue with Semaphore by @dairiki in #1118
• refactor(tests): speed up tests/test_images.py by @dairiki in #1125
• update frontend deps; remove react-router hack by @yagebu in #1126
• CI: Fix(?) for macos test runner hang by @dairiki in #1132
• Customizeable shortcut hotkeys by @dairiki in #1052
• Use Pillow rather than Imagemagick for thumbnail generation by @dairiki in #1104
• CI: omit repeated slow tests by @dairiki in #1131
• frontend: reduce size; use @fontsource by @yagebu in #1130
• Conftest.restore_import_state should restore sys.meta_path as well as sys.path by @dairiki in #1140
• Markdown backward compatibility improvements by @dairiki in #1134
• Fix #1142: address deprecation of werkzeug.urls.url_parse by @dairiki in #1143
• Fix a couple of edge-case bugs in URL resolution by @dairiki in #1133
• refactor: Disuse watchdog in favor of watchfiles. by @dairiki in #1136
• Refactor: Name thumbnail files based on final thumbnail parameters by @dairiki in #1139
• Fix: reduce number of deprecation warnings by @dairiki in #1135

Full Changelog: v3.4.0b5...v3.4.0b6