chore(package): update ts-jest to version 24.2.0

Closes #43

Author: greenkeeper[bot]

package.json

@@ -55,7 +55,7 @@
     "coveralls": "3.0.3",
     "jest": "24.8.0",
     "rimraf": "2.6.3",
-    "ts-jest": "24.0.2",
+    "ts-jest": "24.2.0",
     "ts-node": "8.1.1",
     "tslint": "5.12.0",
     "tslint-config-prettier": "1.17.0",