Avoid relying on NORM in default v3 models (#6176)
Avoid relying on NORM in default v3 models (#6176)

* Allow CharacterEmbed to specify feature

* Default to LOWER in character embed

* Update tok2vec

* Use LOWER, not NORM
honnibal/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,spacy-io/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,spacy-io/spaCy,explosion/spaCy,explosion/spaCy