chore(deps): update dependency ts-jest to v27.1.5

Author: renovate[bot]

mock-server/package-lock.json

@@ -49,7 +49,7 @@
     "depcheck": "1.4.3",
     "gts": "3.1.1",
     "jest": "27.5.1",
-    "ts-jest": "27.1.3",
+    "ts-jest": "27.1.5",
     "tslint": "6.1.3",
     "typescript": "4.0.5",
     "wait-on": "6.0.1"