release v0.12.1

External:

• MLflow functions now accessible from interpret_community.mlflow rather than interpret_community.mlflow.mlflow
• Multiclass visualization available in the new dashboard

Internal:

• tracking URI in MLflow testing now configurable
• linting for TS visualization code
• websocket-extensions upgrades for security
• additional explanation_method information will be passed to the dashboard for display
• pin keras dependency for testing
• added Janhavi as an author!