upgrade node version

Author: peterjgrainger

.github/workflows/test.yml

@@ -0,0 +1,18 @@
+name: 'Test Action works'
+on: [push]
+
+jobs:
+  create-branch:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+
+      - name: "npm ci"
+        run: npm ci
+
+      - name: "npm run build"
+        run: npm run build
+
+      - uses: ./
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

action.yml

@@ -14,5 +14,5 @@ outputs:
   created:
     description: 'Boolean value representing whether or not a new branch was created.'
 runs:
-  using: 'node12'
+  using: 'node16'
   main: 'dist/index.js'