chore: update workflows

Author: woothu

.github/workflows/greetings.yml

@@ -9,5 +9,5 @@ jobs:
     - uses: actions/first-interaction@v1
       with:
         repo-token: ${{ secrets.GITHUB_TOKEN }}
-        issue-message: 'Hi! Thank you for contributing to our project. You are helping to make our product better! :)'
-        pr-message: 'Hi! Thank you for contributing to our project. You are helping to make our product better! :)'
+        issue-message: 'Hi! Thank you for your first contribution to our project. You are helping to make our product better! :)'
+        pr-message: 'Hi! Thank you for your first PR to our project. You are helping to make our product better! :)'

.github/workflows/nodejs.yml

@@ -1,6 +1,9 @@
 name: Node CI
 
-on: [push]
+on: 
+  push:
+  pull_request:
+  schedule: [0 6 * * *]
 
 jobs:
   build:
@@ -9,7 +12,8 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [8.x]
+        node-version: [8.x, 10.x, 12.x]
+        os: [ubuntu-latest, windows-latest, macOS-latest]
 
     steps:
     - uses: actions/checkout@v1