Upgrade mypy to 0.620 (#15612)

homeassistant/core.py

@@ -126,7 +126,7 @@ class HomeAssistant:
         else:
             self.loop = loop or asyncio.get_event_loop()
 
-        executor_opts = {'max_workers': None}
+        executor_opts = {'max_workers': None}  # type: Dict[str, Any]
         if sys.version_info[:2] >= (3, 6):
             executor_opts['thread_name_prefix'] = 'SyncWorker'
 

requirements_test.txt

@@ -6,7 +6,7 @@ coveralls==1.2.0
 flake8-docstrings==1.0.3
 flake8==3.5
 mock-open==1.3.1
-mypy==0.610
+mypy==0.620
 pydocstyle==1.1.1
 pylint==1.9.2
 pytest-aiohttp==0.3.0

requirements_test_all.txt

@@ -7,7 +7,7 @@ coveralls==1.2.0
 flake8-docstrings==1.0.3
 flake8==3.5
 mock-open==1.3.1
-mypy==0.610
+mypy==0.620
 pydocstyle==1.1.1
 pylint==1.9.2
 pytest-aiohttp==0.3.0