Update GitHub Actions workflows to use self-hosted runners

.github/workflows/main.yml

@@ -0,0 +1,30 @@
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  build:
+    runs-on: self-hosted  # This line specifies to use your self-hosted runner
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+
+    - name: Run tests
+      run: |
+        python -m unittest discover tests
+
+    # Add any other steps your workflow needs

.github/workflows/python-tests-and-publish.yml

@@ -10,7 +10,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted  # This line specifies to use your self-hosted runner
     strategy:
       matrix:
         python-version: [3.7, 3.8, 3.9]

.github/workflows/python-tests.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: self-hosted  # This line specifies to use your self-hosted runner
     strategy:
       matrix:
         python-version: [3.7, 3.8, 3.9]