fix(package): update chalk to version 4.0.0

Closes #122

Author: greenkeeper[bot]

package.json

@@ -14,7 +14,7 @@
     "url": "https://github.com/interledgerjs/moneyd"
   },
   "dependencies": {
-    "chalk": "^2.3.0",
+    "chalk": "^4.0.0",
     "ilp-connector": "^23.0.0",
     "ilp-plugin-mini-accounts": "^3.5.1",
     "ilp-store-memory": "^1.0.0",