Update package.json

Add dependency on jest-mock-console

Author: reinrl

package.json

@@ -56,6 +56,7 @@
         "cssnano": "^4.1.10",
         "dtslint": "^3.6.12",
         "jest": "^24.8.0",
+        "jest-mock-console": "^1.2.3",
         "postcss-cli": "^6.1.3",
         "precss": "^4.0.0",
         "prettier": "^1.18.2",