[breaking change] Finish Python 3.5 support

It has already reached to its end-of-life.
See https://www.python.org/dev/peps/pep-0478/

Author: kmyk

.github/workflows/test-unstable-workaround-macos.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.5
+        python-version: 3.6
 
     - name: Get pip cache
       id: pip-cache

.github/workflows/test-unstable-workaround-ubuntu.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.5
+        python-version: 3.6
 
     - name: Get pip cache
       id: pip-cache

.github/workflows/test-unstable-workaround-windows.yml

@@ -19,7 +19,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v2
       with:
-        python-version: 3.5
+        python-version: 3.6
 
     - name: Get pip cache
       id: pip-cache

.github/workflows/test.yml

@@ -10,14 +10,14 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: [3.5, 3.6]
+        python-version: [3.6, 3.8]
         pattern: [stable]  # see test-unstabl-workaround-*.yml
         # pattern: [stable, unstable]
         exclude:
         - os: windows-latest
-          python-version: 3.6
+          python-version: 3.8
         - os: macos-latest
-          python-version: 3.6
+          python-version: 3.8
 
 
 

setup.py

@@ -22,7 +22,7 @@ def load_module(module_path):
     url=version.__url__,
     license=version.__license__,
     description=version.__description__,
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     install_requires=[
         'appdirs >= 1',
         'beautifulsoup4 >= 4',