dashboard: update dependencies in package.json to fix vulnerabilities

Signed-off-by: Eric Zhao <sczyh16@gmail.com>

sentinel-dashboard/src/main/webapp/resources/package.json

@@ -45,11 +45,11 @@
     "gulp-csscomb": "^3.0.8",
     "gulp-cssmin": "^0.2.0",
     "gulp-jshint": "^2.1.0",
-    "gulp-load-plugins": "^1.5.0",
+    "gulp-load-plugins": "^1.6.0",
     "gulp-serv": "0.0.1",
     "gulp-uglify": "^3.0.0",
     "jshint": "^2.10.2",
-    "open": "0.0.5",
+    "open": "^6.3.0",
     "source-map": "^0.7.3"
   }
 }