ci: use python3.9 for pipeline steps and remove python3.5

.drone.jsonnet

@@ -1,4 +1,4 @@
-local PythonVersion(pyversion='3.5') = {
+local PythonVersion(pyversion='3.6') = {
   name: 'python' + std.strReplace(pyversion, '.', '') + '-pytest',
   image: 'python:' + pyversion,
   environment: {
@@ -24,7 +24,7 @@ local PipelineLint = {
   steps: [
     {
       name: 'flake8',
-      image: 'python:3.8',
+      image: 'python:3.9',
       environment: {
         PY_COLORS: 1,
       },
@@ -47,10 +47,10 @@ local PipelineTest = {
     arch: 'amd64',
   },
   steps: [
-    PythonVersion(pyversion='3.5'),
     PythonVersion(pyversion='3.6'),
     PythonVersion(pyversion='3.7'),
     PythonVersion(pyversion='3.8'),
+    PythonVersion(pyversion='3.9'),
   ],
   depends_on: [
     'lint',
@@ -70,7 +70,7 @@ local PipelineBuild = {
   steps: [
     {
       name: 'build',
-      image: 'python:3.8',
+      image: 'python:3.9',
       commands: [
         'pip install ansible -qq',
         'ansible-galaxy collection build --output-path dist/',

.drone.yml

@@ -8,7 +8,7 @@ platform:
 
 steps:
 - name: flake8
-  image: python:3.8
+  image: python:3.9
   commands:
   - pip install -r dev-requirements.txt -qq
   - flake8
@@ -30,17 +30,6 @@ platform:
   arch: amd64
 
 steps:
-- name: python35-pytest
-  image: python:3.5
-  commands:
-  - pip install -r dev-requirements.txt -qq
-  - pip install -r test/unit/requirements.txt -qq
-  - python -m pytest --cov --cov-append --no-cov-on-fail
-  environment:
-    PY_COLORS: 1
-  depends_on:
-  - clone
-
 - name: python36-pytest
   image: python:3.6
   commands:
@@ -74,6 +63,17 @@ steps:
   depends_on:
   - clone
 
+- name: python39-pytest
+  image: python:3.9
+  commands:
+  - pip install -r dev-requirements.txt -qq
+  - pip install -r test/unit/requirements.txt -qq
+  - python -m pytest --cov --cov-append --no-cov-on-fail
+  environment:
+    PY_COLORS: 1
+  depends_on:
+  - clone
+
 trigger:
   ref:
   - refs/heads/master
@@ -93,7 +93,7 @@ platform:
 
 steps:
 - name: build
-  image: python:3.8
+  image: python:3.9
   commands:
   - pip install ansible -qq
   - ansible-galaxy collection build --output-path dist/
@@ -199,6 +199,6 @@ depends_on:
 
 ---
 kind: signature
-hmac: ccd6854d77f9c42527ab5ca2b8337c8ee904fc917b9b229e2761352f578b35e6
+hmac: 1bd261fd58a56939db7b1e2cbccf52a5d3d43e04329da9222524fa924c9de9dc
 
 ...