CI: Update test workflow with narrower job spec, more Python versions, concurrency

Author: effigies

.github/workflows/test.yml

@@ -1,6 +1,19 @@
 name: Test suite
 
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
+    tags:
+      - "*"
+  pull_request:
+    branches:
+      - master
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 
 jobs:
   build:
@@ -9,13 +22,13 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
 
     steps:
     - name: Checkout repo
-      uses: actions/checkout@v1
+      uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install