chore(travis): wrap sudo commands in quotation marks

Author: mbroadst

.travis.yml

@@ -14,8 +14,8 @@ cache:
     - node_modules
 
 before_script:
-  - sudo chown root /opt/google/chrome/chrome-sandbox
-  - sudo chmod 4755 /opt/google/chrome/chrome-sandbox
+  - "sudo chown root /opt/google/chrome/chrome-sandbox"
+  - "sudo chmod 4755 /opt/google/chrome/chrome-sandbox"
 
 script:
   - npm run-script test-node