updated ts-jest config

Author: hs

jest.config.json

@@ -14,7 +14,7 @@
         "json"
     ],
     "transform": {
-        "\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
+        "\\.(ts|tsx)$": "ts-jest"
     },
     "testURL": "http://localhost/",
     "verbose": true,