ci: add cancel-in-progress

Author: james-d-mitchell

.github/workflows/pylint.yml

@@ -1,6 +1,10 @@
 name: Pylint
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   default:
     runs-on: ubuntu-latest

.github/workflows/tests.yml

@@ -1,6 +1,10 @@
 name: Tests
 on: [pull_request]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   default:
     runs-on: ubuntu-latest

.github/workflows/wheels.yml

@@ -8,6 +8,10 @@ on:
     branches:
       - "rc-v*.*.*"
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build_wheels:
     name: Build wheels on ${{ matrix.os }}