Moving Cocoapods update to before_install TravisCI hook

Author: gabrielbiga

.travis.yml

@@ -46,7 +46,8 @@ matrix:
       language: node_js
       node_js: "10"
       jdk: oraclejdk8
-      script: pod repo update && cd ../demo && travis_wait travis_retry tns build ios --bundle
+      before_install: pod repo update
+      script: cd ../demo && travis_wait travis_retry tns build ios --bundle
     - language: android
       os: linux
       env:
@@ -71,5 +72,6 @@ matrix:
       language: node_js
       node_js: "10"
       jdk: oraclejdk8
+      before_install: pod repo update
       script:
-        - pod repo update && cd ../demo && travis_wait travis_retry tns build ios
+        - cd ../demo && travis_wait travis_retry tns build ios