Update .travis.yml

Author: praneshr

.travis.yml

@@ -1,7 +1,13 @@
 language: node_js
 node_js: 8
 before_script: yarn build
-after_success: './publish-examples.sh'
+after_success:
+  if ([ "$TRAVIS_BRANCH" == "master" ] || [ ! -z "$TRAVIS_TAG" ]) && 
+      [ "$TRAVIS_PULL_REQUEST" == "false" ]; then
+    './publish-examples.sh'
+  else
+    echo "Skipping examples deployment..."
+  fi
 deploy:
   skip_cleanup: true
   provider: npm