chore: update dependency bpmn-js-element-templates to v2

Author: renovate[bot]

package-lock.json

@@ -49,7 +49,7 @@
     "babel-loader": "^9.1.3",
     "babel-plugin-istanbul": "^7.0.0",
     "bpmn-js": "^17.0.0",
-    "bpmn-js-element-templates": "^1.10.0",
+    "bpmn-js-element-templates": "^2.0.0",
     "bpmn-js-properties-panel": "^5.7.0",
     "cross-env": "^7.0.3",
     "downloadjs": "^1.4.7",