Merge pull request #4 from owsas/renovate/ts-jest-21.x

chore(deps): update dependency ts-jest to v21.2.4

Author: jcguarinpenaranda

package.json

@@ -19,7 +19,7 @@
     "jest": "22.4.2",
     "moment": "2.21.0",
     "parse": "1.11.0",
-    "ts-jest": "21.1.3",
+    "ts-jest": "21.2.4",
     "tslint": "5.8.0",
     "tslint-config-airbnb": "5.3.0",
     "typescript": "2.5.3"