add test-image-gl2d to npm test command

Author: etpinard

package.json

@@ -39,7 +39,7 @@
     "test-export": "node tasks/test_export.js",
     "test-syntax": "node tasks/test_syntax.js",
     "test-bundle": "node tasks/test_bundle.js",
-    "test": "npm run citest-jasmine && npm run test-image && npm run test-syntax && npm run test-bundle",
+    "test": "npm run citest-jasmine && npm run test-image && npm run test-image-gl2d && npm run test-syntax && npm run test-bundle",
     "start-test_dashboard": "node devtools/test_dashboard/server.js",
     "start-image_viewer": "node devtools/image_viewer/server.js",
     "start": "npm run start-test_dashboard",