add jest@25 to devDependencies

Author: Christopher J. Brody

package.json

@@ -64,6 +64,7 @@
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-promise": "^4.2.1",
     "eslint-plugin-standard": "^4.0.1",
+    "jest": "^25.2.4",
     "recursive-readdir": "^2.2.2"
   }
 }