Address PR comments from @robertbrignull

.github/workflows/pr-checks.yml

@@ -27,7 +27,7 @@ jobs:
       run: .github/workflows/script/check-js.sh
 
   check-node-modules:
-    runs-on: ubuntu-latest
+    runs-on: macos-latest
 
     steps:
     - uses: actions/checkout@v2

.github/workflows/script/check-node-modules.sh

@@ -7,6 +7,7 @@ if [ ! -z "$(git status --porcelain)" ]; then
     >&2 echo "Failed: Repo should be clean before testing!"
     exit 1
 fi
+sudo npm install --force -g npm@latest
 # Reinstall modules and then clean to remove absolute paths
 # Use 'npm ci' instead of 'npm install' as this is intended to be reproducible
 npm ci

.github/workflows/update-dependencies.yml

@@ -1,6 +1,7 @@
 name: Update dependencies
 on:
-  pull_request:
+  pull_request_target:
+    types: [opened, synchronize, reopened, labeled]
 
 jobs:
   update:
@@ -32,6 +33,9 @@ jobs:
         git config --global user.email "github-actions@github.com"
         git config --global user.name "github-actions[bot]"
         git add node_modules
-        git commit -am "Update checked-in dependencies"
-        git push
+        if ! git commit -am "Update checked-in dependencies" ; then
+          echo "No changes detected, skipping pushing..."
+          exit 0
+        fi
+        git push origin "$BRANCH"