More updates for npm ci. Include examples.

Author: timdorr

.travis.yml

@@ -13,12 +13,4 @@ branches:
     - next
 cache:
   directories:
-  - examples/async/node_modules
-  - examples/counter/node_modules
-  - examples/real-world/node_modules
-  - examples/shopping-cart/node_modules
-  - examples/todomvc/node_modules
-  - examples/todos/node_modules
-  - examples/todos-with-undo/node_modules
-  - examples/tree-view/node_modules
-  - examples/universal/node_modules
+    - "$HOME/.npm"

examples/testAll.js

@@ -13,7 +13,7 @@ const exampleDirs = fs.readdirSync(__dirname).filter((file) => {
 
 // Ordering is important here. `npm install` must come first.
 const cmdArgs = [
-  { cmd: 'npm', args: [ 'install', '--progress=false' ] },
+  { cmd: 'npm', args: [ 'ci' ] },
   { cmd: 'npm', args: [ 'test' ] }
 ]