chore(release): Prepare release: set version to 7.12.15

Author: camunda-jenkins

package.json

@@ -1,7 +1,7 @@
 {
   "private": true,
   "name": "camunda-commons-ui",
-  "version": "7.12.15-SNAPSHOT",
+  "version": "7.12.15",
   "description": "Common files for camunda BPM platform UIs",
   "main": "index.js",
   "gruntConfig": {
@@ -43,7 +43,7 @@
     "bootstrap": "3.4.1",
     "bpmn-font": "0.8.0",
     "bpmn-js": "3.4.3",
-    "camunda-bpm-sdk-js": "git://github.com/camunda/camunda-bpm-sdk-js#7.12",
+    "camunda-bpm-sdk-js": "git://github.com/camunda/camunda-bpm-sdk-js#7.12.15",
     "clipboard": "2.0.4",
     "cmmn-js": "0.18.1",
     "dmn-js": "8.0.2",