bump open to 6.0.0

Author: etpinard

package-lock.json

@@ -152,7 +152,7 @@
     "minimist": "^1.2.0",
     "node-sass": "^4.11.0",
     "npm-link-check": "^3.0.0",
-    "open": "0.0.5",
+    "open": "^6.0.0",
     "prepend-file": "^1.3.1",
     "prettysize": "^2.0.0",
     "read-last-lines": "^1.7.0",