fix(deps): pin dependency merge to 1.2.1 (#129)

Author: renovate[bot]

package-lock.json

@@ -43,7 +43,7 @@
   },
   "homepage": "https://github.com/believer/clearingnummer#readme",
   "dependencies": {
-    "merge": "^1.2.1"
+    "merge": "1.2.1"
   },
   "devDependencies": {
     "@commitlint/cli": "7.2.1",