bit overoptimistic on package levels... backed off sentiment

.travis.yml

@@ -2,9 +2,9 @@ sudo: false
 language: node_js
 matrix:
   include:
-    - node_js: 8
-    - node_js: 10
     - node_js: 12
+    - node_js: 10
+    - node_js: 8
     - python: 2.7
       language: python
       before_script: pip install flake8

package.json

@@ -50,7 +50,7 @@
         "poplib": "^0.1.7",
         "proxyquire": "^2.1.0",
         "pushbullet": "^2.4.0",
-        "sentiment": "^5.0.1",
+        "sentiment": "^2.1.0",
         "should": "^13.2.3",
         "sinon": "^7.2.7",
         "supertest": "^4.0.2",