[tox] rename deprecated whitelist_externals to allowlist_externals
- cubicweb/cubes/counters!38 (merged)
- cubicweb/cubes/dataprocessing!30 (merged)
- cubicweb/cubes/fckeditorcompat!36 (merged)
- cubicweb/cubes/i18nfield!51 (merged)
- cubicweb/cubes/inlinedit!32 (merged)
- cubicweb/cubes/jsonb!46 (merged)
- cubicweb/cubes/prov!36 (merged)
- cubicweb/cubes/subprocess!42 (merged)
- cubicweb/cubes/treeview!43 (merged)
- cubicweb/cubes/vtimeline!34 (merged)
- cubicweb/cubes/wireit!44 (merged)