Fix: CI error for python 3.6 & macOS (jupyter#6215)

Co-authored-by: GitHub Action <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: maliubiao <[email protected]>
Co-authored-by: Maxim Martynov <[email protected]>
Co-authored-by: Niyas Sait <[email protected]>
Co-authored-by: Jiaqi <[email protected]>
Co-authored-by: Ben Greiner <[email protected]>
Co-authored-by: David Leen <[email protected]>
Co-authored-by: Kevin Bates <[email protected]>
Co-authored-by: Steven Silvester <[email protected]>

Author: 10 people

.github/workflows/docs.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu]
-        python-version: [ '3.6' ]
+        python-version: [ '3.7' ]
     steps:
     - name: Checkout
       uses: actions/checkout@v1

.github/workflows/python-nbconvert.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ '3.6' , '3.7', '3.8', '3.9' ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10' ]
     steps:
     - name: Checkout
       uses: actions/checkout@v1

.github/workflows/python.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu, macos, windows]
-        python-version: [ '3.6' , '3.7', '3.8', '3.9' ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10' ]
     steps:
     - name: Checkout
       uses: actions/checkout@v1

.github/workflows/selenium.yml

@@ -12,7 +12,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu, macos]
-        python-version: [ '3.6', '3.7', '3.8', '3.9' ]
+        python-version: [ '3.7', '3.8', '3.9', '3.10' ]
     steps:
     - name: Checkout
       uses: actions/checkout@v2