Looks like github actions removed python 3.6 support... moving to 3.7 minimum.

.github/workflows/pythonpackage.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       max-parallel: 4
       matrix:
-        python-version: [3.6, 3.7]
+        python-version: [3.7, 3.8]
 
     steps:
       - uses: actions/checkout@v1

setup.py

@@ -25,7 +25,7 @@ setup(
     name="displayarray",
     version="1.3.1",
     description="Tool for displaying numpy arrays.",
-    python_requires="==3.*,>=3.6.0",
+    python_requires="==3.*,>=3.7.0",
     project_urls={"repository": "https://github.com/simleek/displayarray"},
     author="SimLeek",
     author_email="simulator.leek@gmail.com",