ci: update ci configuration

Author: Harrison Ifeanyichukwu

.travis.yml

@@ -5,7 +5,6 @@ cache:
 notifications:
   email: false
 node_js:
-  - "10"
   - "9"
   - "8"
 script:
@@ -15,6 +14,7 @@ jobs:
     - stage: release
       node_js: "10"
       script:
+        - npm run test
         - npm run build
       after_success:
         - npm run report-coverage