unsupport 3.5, 3.6

Author: tamuhey

.github/workflows/main.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
         os: [macos-latest, windows-latest, ubuntu-latest]
     steps:
     - uses: actions/checkout@v1
@@ -80,7 +80,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9]
         # ubuntu wheel is built in `manylinux_build.yml`
         os: [macos-latest, windows-latest]
 

.github/workflows/manylinux_build.yml

@@ -10,8 +10,6 @@ jobs:
     strategy:
       matrix:
         python-version: 
-          - 3.5
-          - 3.6
           - 3.7
           - 3.8
           - 3.9

.github/workflows/test_pypi.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
         os: [ubuntu-latest, macos-latest, windows-latest]
     steps:
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/test_pypi_manylinux.yml

@@ -14,7 +14,7 @@ jobs:
         container: 
           - centos
           - manylinux
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
+        python-version: [3.7, 3.8, 3.9]
     env:
       DOCKERFILE: dockerfiles/ci/${{ matrix.container }}/Dockerfile
       PYTHON: python${{ matrix.python-version }}