fixed script

Author: zashraf1985

.travis.yml

@@ -20,8 +20,6 @@ env:
 before_install: cd packages/optimizely-sdk
 install: 
   - npm install
-  - npm run install-packages
-  - npm run tsc
 addons:
   srcclr: true
 script: npm test
@@ -55,3 +53,8 @@ jobs:
     - stage: Cross-browser and umd unit tests
       node_js: '8'
       script: npm run test-ci
+    - stage: Test
+      before_install: skip
+      before_script:
+        - npm run install-packages
+        - npm run tsc