chore(deps): update dependency ts-jest to v26.5.2

Author: renovate-bot

package.json

@@ -51,7 +51,7 @@
     "jest": "26.1.0",
     "load-grunt-configs": "1.0.0",
     "prettier": "2.2.1",
-    "ts-jest": "26.5.0",
+    "ts-jest": "26.5.2",
     "ts-node": "9.1.1",
     "tslint": "6.1.3",
     "ttypescript": "1.5.12",