fix(package): update @adobe/helix-simulator to version 2.12.12

Author: greenkeeper[bot]

package-lock.json

@@ -37,7 +37,7 @@
     "@adobe/fastly-native-promises": "^1.3.2",
     "@adobe/helix-pipeline": "^2.1.1",
     "@adobe/helix-shared": "1.3.2",
-    "@adobe/helix-simulator": "2.12.11",
+    "@adobe/helix-simulator": "2.12.12",
     "@adobe/parcel-plugin-htl": "2.1.11",
     "@babel/core": "^7.4.5",
     "@parcel/logger": "1.11.0",