deps: update to diagram-js@8.0.0-0

Ships with the improved multi-root capabilities.

package-lock.json

@@ -3333,9 +3333,9 @@
       "dev": true
     },
     "diagram-js": {
-      "version": "7.8.1",
-      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-7.8.1.tgz",
-      "integrity": "sha512-Ziy5vTmB8V/kxuhgxQXdnNxSYnqlWxFrBih37MOOglDzyQ5mBIA8tFNssp/ncHpZmhTGC8sb54lYknovzyrrzg==",
+      "version": "8.0.0-0",
+      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-8.0.0-0.tgz",
+      "integrity": "sha512-yh3OaKeyOGJlrI+Va5uQwTvVNmrJvmXfo9I5DBe5Kli0+J20f2A07et9fOKlbvSI0FA8Mt4vMgSEi+z7/58wUA==",
       "requires": {
         "css.escape": "^1.5.1",
         "didi": "^5.2.1",

package.json

@@ -100,7 +100,7 @@
   "dependencies": {
     "bpmn-moddle": "^7.1.2",
     "css.escape": "^1.5.1",
-    "diagram-js": "^7.8.1",
+    "diagram-js": "^8.0.0-0",
     "diagram-js-direct-editing": "^1.6.3",
     "ids": "^1.0.0",
     "inherits": "^2.0.4",