[CHORE] Update CI

Author: lvegerano

.travis.yml

@@ -1,18 +1,20 @@
 language: node_js
 node_js:
-  # we recommend testing addons with the same minimum supported node version as Ember CLI
-  # so that your addon works for all apps
-  - "8"
+  # Node 10.3+ includes npm@6 which has good "npm ci" command
+  - "10.9"
 
 sudo: false
-dist: trusty
 
 addons:
   chrome: stable
+  apt:
+    packages:
+    - libgconf-2-4
 
 cache:
+  npm: true
   directories:
-    - $HOME/.npm
+    - $HOME/.cache
 
 env:
   global:
@@ -22,6 +24,7 @@ env:
 branches:
   only:
     - master
+    - managed-list
     # npm version tags
     - /^v\d+\.\d+\.\d+/
 
@@ -42,7 +45,7 @@ jobs:
     - stage: "Additional Tests"
       name: "Floating Dependencies"
       install:
-        - npm install --no-package-lock
+        - npm ci
       script:
         - npm test
 

package.json

@@ -75,7 +75,7 @@
     "sortablejs": ">= 1.10.2 < 2"
   },
   "engines": {
-    "node": "8.* || >= 10.*"
+    "node": "10.* || >= 12"
   },
   "ember": {
     "edition": "octane"