Use latest version of mypy and fix type hinting accordingly (#1239)

* Use latest version of mypy and fix type hinting accordingly

Also:
- Update Pipfile to never require mock since we only support Python 3.6+
- Remove Azure Pipelines badge from Readme and fix section links there
- Added an "inv format" task to run black and isort to auto-format all code before a commit

* Try to fix type errors on versions prior to 3.8

* Restored correct types in argparse_custom.py

1 files changed, 11 insertions, 0 deletions

diff --git a/tasks.py b/tasks.py
index 58bd1df8..a55661d8 100644
--- a/tasks.py
+++ b/tasks.py
@@ -353,3 +353,14 @@ def flake8(context):
 
 
 namespace.add_task(flake8)
+
+
+# Black and isort auto-formatting
+@invoke.task()
+def format(context):
+    """Run black and isort auto-formatting for code style enforcement"""
+    with context.cd(TASK_ROOT_STR):
+        context.run("black . && isort .")
+
+
+namespace.add_task(format)