Added Python 3.6 to pypi.yml

Author: arjanz

.github/workflows/pypi.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: macos-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-python@v2
@@ -57,7 +57,7 @@ jobs:
     runs-on: windows-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
         target: [x64, x86]
     steps:
       - uses: actions/checkout@v2
@@ -99,7 +99,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10']
         target: [x86_64, i686]
     steps:
       - uses: actions/checkout@v2