run cypress only for PRs

Author: contactashish13

.travis.yml

@@ -18,6 +18,7 @@ matrix:
       env: TEST_SUITE=Wraith_Visual_Regression_Testing WRAITH_FAIL=5
       script: "./bin/wraith.sh"
     - name: Cypress
+      if: type IN (pull_request)
       language: node_js
       node_js:
         - 10.8