only install codepush for deploy builds

Author: hawkrives

scripts/travis/install.sh

@@ -4,8 +4,8 @@ set -e -v
 # install packages
 npm install
 
-# install code-push
-if [[ $IOS || $ANDROID ]]; then
+# install code-push, if we're going to use it
+if [[ ( $IOS || $ANDROID ) && $run_deploy == 1 ]]; then
   npm install -g code-push-cli@latest
   code-push login --accessKey "$CODEPUSH_TOKEN"
 fi