update eslint configuration

Author: Matt Berther

.eslintrc.js

@@ -0,0 +1,19 @@
+{
+    "extends": [
+        "eslint:recommended",
+        "plugin:node/recommended"
+    ],
+    "env": {
+        "node": true,
+        "mocha": true
+    },
+    "rules": {
+        "indent": ["error", 4],
+        "camelcase": ["error", {
+            "properties": "never"
+        }],
+        "node/no-unpublished-require": ["error", {
+            "allowModules": ["chai", "rimraf", "moment"]
+        }]
+    }
+}

.eslintrc.json

@@ -34,7 +34,7 @@
   "devDependencies": {
     "chai": "4.2.0",
     "eslint": "^6.0.1",
-    "eslint-config-xo": "^0.26.0",
+    "eslint-plugin-node": "^10.0.0",
     "mocha": "^6.1.4",
     "moment": "^2.24.0",
     "rimraf": "2.6.3"