chore(package): update ts-jest to version 25.1.0

Author: greenkeeper[bot]

package.json

@@ -31,7 +31,7 @@
     "@types/rimraf": "^2.0.2",
     "fs-cmp": "^1.0.0",
     "jest": "^24.8.0",
-    "ts-jest": "^24.0.2",
+    "ts-jest": "^25.1.0",
     "typescript": "^3.4.5"
   }
 }