deps: update to diagram-js@9.0.0-alpha.1

Author: nikku

package-lock.json

@@ -67,7 +67,7 @@
     "chai": "^4.3.5",
     "cross-env": "^7.0.3",
     "del-cli": "^4.0.0",
-    "diagram-js": "^7.5.0",
+    "diagram-js": "^9.0.0-alpha.1",
     "eslint": "^7.32.0",
     "eslint-plugin-bpmn-io": "^0.14.0",
     "eslint-plugin-import": "^2.23.4",