Removed Python version 3.5

Removed support for Python version 3.5 as discussed

Author: geekchick

.github/workflows/ot.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8.8, 3.9]
+        python-version: [3.6, 3.7, 3.8.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2