ci: stop previous workflow on new push

Author: jcs090218

.github/workflows/build.yml

@@ -1,4 +1,5 @@
 name: 'Build'
+
 on:
   pull_request:
   push:
@@ -8,6 +9,10 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   dist:
     runs-on: [ubuntu-latest]

.github/workflows/test.yml

@@ -1,4 +1,5 @@
 name: 'CI'
+
 on:
   pull_request:
   push:
@@ -8,6 +9,10 @@ on:
     branches:
       - master
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}