Updated travis.yml and bumped babel version

Author: rohan-deshpande

.travis.yml

@@ -1,10 +1,6 @@
 language: node_js
 node_js:
   - 'node'
-  - 'lts/*'
-cache:
-  directories:
-    - ~/.npm
 install: npm install
 script:
   - npm run lint
@@ -15,3 +11,5 @@ branches:
   - /^feature.*$/
 notifications:
   email: false
+cache:
+  npm: true

package-lock.json

@@ -62,7 +62,7 @@
     "react-color": "^2.13.8"
   },
   "devDependencies": {
-    "@babel/core": "^7.5.4",
+    "@babel/core": "^7.8.7",
     "@babel/plugin-proposal-class-properties": "^7.5.0",
     "@babel/plugin-proposal-object-rest-spread": "^7.5.4",
     "@babel/plugin-transform-runtime": "^7.5.0",