chore(project): bump diagram-js dependency

Fixes text sometimes being selected during dragging.

* makes a ContextPad hack obsolete, too.

lib/features/context-pad/ContextPadProvider.js

@@ -94,10 +94,6 @@ ContextPadProvider.prototype.getContextPadEntries = function(element) {
   var businessObject = element.businessObject;
 
   function startConnect(event, element) {
-
-    // prevent dragging of connection symbol
-    event.preventDefault();
-
     connect.start(event, element);
   }
 

package-lock.json

@@ -1633,9 +1633,9 @@
       "dev": true
     },
     "diagram-js": {
-      "version": "0.27.0",
-      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-0.27.0.tgz",
-      "integrity": "sha512-ntk5Hiek20ucjLgGWjlZQmO3kcqiPciqDYZWBWvYDfzWK6lI2nSUTXc8WnkQKkiHnfboWPy9FHMpQocDYGpnvQ==",
+      "version": "0.27.1",
+      "resolved": "https://registry.npmjs.org/diagram-js/-/diagram-js-0.27.1.tgz",
+      "integrity": "sha512-ahaMvshLl7YGZFNOKmKxo5lYu3bXkr/sWWy9efay/wXfTkjer2/672sMeE/wWQEebHFXqR06EJUYHaer5MwPJg==",
       "requires": {
         "didi": "0.1.1",
         "hammerjs": "2.0.8",

package.json

@@ -76,7 +76,7 @@
   },
   "dependencies": {
     "bpmn-moddle": "^2.0.0",
-    "diagram-js": "^0.27.0",
+    "diagram-js": "^0.27.1",
     "diagram-js-direct-editing": "^0.22.0",
     "ids": "^0.2.0",
     "inherits": "^2.0.1",