chore: Rename workflow, add node 11.x to test matrix

.github/workflows/nodejs.yml

@@ -1,4 +1,4 @@
-name: Node CI
+name: Build & Test
 
 on:
   push:
@@ -15,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x]
+        node-version: [10.x, 11.x, 12.x]
 
     steps:
     - uses: actions/checkout@v1