Apache Airflow: Airflow 1.10.12, 2020-08-25

### New Features - Add DateTimeSensor (#9697) - Add ClusterPolicyViolation support to airflow local settings (#10282) - Get Airflow configs with sensitive data from Secret Backends (#9645) - [AIRFLOW-4734] Upsert functionality for PostgresHook.insert_rows() (#8625) - Allow defining custom XCom class (#8560) ### Bug Fixes - Add pre 1.10.11 Kubernetes Paths back with Deprecation Warning (#10067) - Fixes PodMutationHook for backwards compatibility (#9903) - Fix bug in executor_config when defining resources (#9935) - Respect DAG Serialization setting when running sync_perm (#10321) - Show correct duration on graph view for running task (#8311) (#8675) - Fix regression in SQLThresholdCheckOperator (#9312) - [AIRFLOW-6931] Fixed migrations to find all dependencies for MSSQL (#9891) - Avoid sharing session with RenderedTaskInstanceFields write and delete (#9993) - Fix clear future recursive when ExternalTaskMarker is used (#9515) - Handle IntegrityError while creating TIs (#10136) - Fix airflow-webserver startup errors when using Kerberos Auth (#10047) - Fixes treatment of open slots in scheduler (#9316) (#9505) - Fix KubernetesPodOperator reattachment (#10230) - Fix more PodMutationHook issues for backwards compatibility (#10084) - [AIRFLOW-5391] Do not re-run skipped tasks when they are cleared (#7276) - Fix task_instance_mutation_hook (#9910) - Fixes failing formatting of DAG file containing {} in docstring (#9779) - Fix is_terminal_support_colors function (#9734) - Fix PythonVirtualenvOperator when using ``provide_context=True`` (#8256) - Fix issue with mounting volumes from secrets (#10366) - BugFix: K8s Executor Multinamespace mode is evaluated to true by default (#10410) - Make KubernetesExecutor recognize kubernetes_labels (#10412) - Fix broken Kubernetes PodRuntimeInfoEnv (#10478) ### Improvements - Use Hash of Serialized DAG to determine DAG is changed or not (#10227) - Update Serialized DAGs in Webserver when DAGs are Updated (#9851) - Do not Update Serialized DAGs in DB if DAG did not change (#9850) - Add __repr__ to SerializedDagModel (#9862) - Update JS packages to latest versions (#9811) (#9921) - UI Graph View: Focus upstream / downstream task dependencies on mouseover (#9303) - Allow ``image`` in ``KubernetesPodOperator`` to be templated (#10068) - [AIRFLOW-6843] Add delete_option_kwargs to delete_namespaced_pod (#7523) - Improve process terminating in scheduler_job (#8064) - Replace deprecated base classes used in bigquery_check_operator (#10272) - [AIRFLOW-5897] Allow setting -1 as pool slots value in webserver (#6550) - Limit all google-cloud api to <2.0.0 (#10317) - [AIRFLOW-6706] Lazy load operator extra links (#7327) (#10318) - Add Snowflake support to SQL operator and sensor (#9843) - Makes multi-namespace mode optional (#9570) - Pin Pyarrow < 1.0 - Pin pymongo version to <3.11.0 - Pin google-cloud-container to <2 (#9901) - Dockerfile: Remove package.json and yarn.lock from the prod image (#9814) - Dockerfile: The group of embedded DAGs should be root to be OpenShift compatible (#9794) - Update upper limit of flask-swagger, gunicorn & jinja2 (#9684) - Webserver: Sanitize values passed to origin param (#10334) - Sort connection type list in add/edit page alphabetically (#8692) ### Doc only changes - Add new committers: Ry Walker & Leah Cole to project.rst (#9892) - Add Qingping Hou to committers list (#9725) - Updated link to official documentation (#9629) - Create a short-link for Airflow Slack Invites (#10034) - Fix docstrings in BigQueryGetDataOperator (#10042) - Set language on code-block on docs/howto/email-config.rst (#10238) - Remove duplicate line from 1.10.10 CHANGELOG (#10289) - Improve heading on Email Configuration page (#10175) - Fix link for the Jinja Project in docs/tutorial.rst (#10245) - Create separate section for Cron Presets (#10247) - Add Syntax Highlights to code-blocks in docs/best-practices.rst (#10258) - Fix docstrings in BigQueryGetDataOperator (#10042) - Fix typo in Task Lifecycle section (#9867) - Make Secret Backend docs clearer about Variable & Connection View (#8913)