Updates travis.yml

Author: gasharova

.travis.yml

@@ -10,7 +10,7 @@ before_script:
   - typings install
 script:
   - npm run build # Runs next build
-  - npm run export # Runs next export and generates the out directory
+  - npx next export # Runs next export and generates the out directory
   - touch out/.nojekyll # Creates a file telling Github not to build the project using Jekyll
 deploy:
   provider: pages # Informs Travis this is a deployment to GitHub Pages