chore(package): update ts-jest to version 25.3.1

Closes #26

Author: greenkeeper[bot]

package.json

@@ -51,7 +51,7 @@
     "react-dom": "^16.8.5",
     "react-native": "^0.59.2",
     "semantic-release": "^15.13.3",
-    "ts-jest": "^24.0.0",
+    "ts-jest": "^25.3.1",
     "tslint": "^5.14.0",
     "tslint-config-prettier": "^1.18.0",
     "tslint-plugin-prettier": "^2.0.1",