chore(project): bump diagram-js version

* Fixes markers to be properly removed on connect/reconnect
  in Internet Explorer / Edge.

Related to bpmn-io/diagram-js#236

package-lock.json

@@ -1686,9 +1686,9 @@
       "dev": true
     },
     "diagram-js": {
-      "version": "0.22.3",
-      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-0.22.3.tgz",
-      "integrity": "sha512-naqn6IOOrjDICBNvQGUW5ax1Y+84Yi9JrgmXLJWo9Zp0nC3L4WRkIGyF++iao+4ZiK8D3hVJ/3mSCAlaN4HT+w==",
+      "version": "0.22.4",
+      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-0.22.4.tgz",
+      "integrity": "sha512-1LnQDq5+Ck+0IgjPy/ul62E4bYDVudlZ72fQHz4Gc/D/ygfDJGTVO47BRKZjKlyKH+VgdU/+0FLgsieXpjgfmQ==",
       "requires": {
         "didi": "0.1.1",
         "hammerjs": "2.0.8",

package.json

@@ -77,7 +77,7 @@
   },
   "dependencies": {
     "bpmn-moddle": "^1.1.0",
-    "diagram-js": "^0.22.3",
+    "diagram-js": "^0.22.4",
     "diagram-js-direct-editing": "^0.19.0",
     "diagram-js-origin": "^0.15.2",
     "ids": "^0.2.0",