Fix return value of Language.update (closes #3692)
Fix return value of Language.update (closes #3692)

explosion/spaCy,spacy-io/spaCy,spacy-io/spaCy,spacy-io/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,honnibal/spaCy,spacy-io/spaCy,honnibal/spaCy,explosion/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,spacy-io/spaCy,spacy-io/spaCy