Install missing mypy type

Author: oschwald

.github/workflows/lint.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Install dependencies
         run: |
               python -m pip install --upgrade pip
-              pip install --upgrade pylint black mypy voluptuous-stubs chardet==3.0.4
+              pip install --upgrade pylint black mypy voluptuous-stubs chardet==3.0.4 types-requests
 
       - name: Install
         run: python setup.py install