#240, #294: Drop Python 3.5. Add Python 3.9 support

• Drop support for Python 3.5
  • Requires Python 3.6.8
  • Remove test job
• Update to DuniterPy v0.60.0 which drops Python 3.5 support
• #294 (closed): Update with Py 3.5 support dropped
  • aiohttp updated to v3.7.1
  • multidict updated to v5.0 which drops Py 3.5 support
• Add test-3.9 job

Close #240 (closed).

.gitlab-ci.yml

@@ -46,12 +46,6 @@ format:
     - poetry install
     - poetry run pytest
 
-tests-3.5:
-  extends: .tests
-  tags: [poetry-56]
-  variables:
-    PYTHON_VERSION: "3.5"
-
 tests-3.6:
   extends: .tests
   tags: [poetry-56]
@@ -76,6 +70,12 @@ tests-3.8:
   variables:
     PYTHON_VERSION: "3.8"
 
+tests-3.9:
+  extends: .tests
+  tags: [poetry-56]
+  variables:
+    PYTHON_VERSION: "3.9"
+
 pypi_test:
   stage: publish
   rules: