v4.5.6: Lemmatizer & Tokenizer bugfixes

English Lemmatizer upgrades

• enroll, appall as American spellings, instead of enrol & appal. de- as a verb prefix, blog and xfer as double letter exceptions 8adcbfe
• cowritten 2dd08da
• elder / eldest 9b5bec8
• Yazidi as a demonym 2852da8

Tokenizer upgrades

• #number as a single thing after an abbreviation #1396 ad37f2a

UD Processing upgrades

• 'twas and 'tis as MWT in the UD converter b9f19a6
• Sort morpho features in alphabetical order when writing out UD
  f77a9b4

Other Bugfixes

• Crash when deleting the endpoints of an IntervalTree #1405 6d17c23
• Find and remove extraneous uses of yield, which became a keyword: e5c9d44 b084233

Minor API change

• Updating the text on a CoreLabel no longer wipes out the Lemma c03522b
• Update to more recent Jakarta Servlet 8a671fd

Ssurgeon

• UpdateMorphoFeatures edit 27c6703
• Lemmatize operation (only works on English) c26b25e