chore(package): update ts-jest to version 23.10.4 (#30)

Author: greenkeeper[bot]

package-lock.json

@@ -37,7 +37,7 @@
     "jest-junit": "^5.2.0",
     "rollup": "^0.66.4",
     "semantic-release": "^15.9.17",
-    "ts-jest": "23.10.3",
+    "ts-jest": "23.10.4",
     "ts-node": "^7.0.1",
     "tslint": "^5.11.0",
     "tslint-immutable": "^4.7.0",