Make ConsoleLogger flush after each logging line (#8810)
Make ConsoleLogger flush after each logging line (#8810)

This is necessary to avoid "logging blackouts" when running training on Kubernetes pods
explosion/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,honnibal/spaCy,explosion/spaCy,explosion/spaCy,honnibal/spaCy