Chore: update linting config (#406)

Author: kaicataldo

.eslintignore

@@ -0,0 +1 @@
+!.eslintrc.js

.eslintrc

@@ -0,0 +1,18 @@
+"use strict";
+
+module.exports = {
+    root: true,
+    extends: "eslint",
+    env: {
+        node: true,
+        es6: true
+    },
+    overrides: [
+        {
+            files: ["tests/lib/*"],
+            env: {
+                mocha: true
+            }
+        }
+    ]
+};

.eslintrc.js

@@ -28,7 +28,8 @@ const NODE_MODULES = "./node_modules/",
     MOCHA = `${NODE_MODULES}mocha/bin/_mocha `,
 
     // Files
-    MAKEFILE = "./Makefile.js",
+    MAKEFILE = "Makefile.js",
+    CONFIG_FILES = ".eslintrc.js",
     JS_FILES = "\"lib/**/*.js\" \"espree.js\"",
     TEST_FILES = "tests/lib/**/*.js";
 
@@ -50,6 +51,12 @@ target.lint = function() {
         errors++;
     }
 
+    echo("Validating configuration files");
+    lastReturn = nodeCLI.exec("eslint", CONFIG_FILES);
+    if (lastReturn.code !== 0) {
+        errors++;
+    }
+
     echo("Validating JavaScript files");
     lastReturn = nodeCLI.exec("eslint", JS_FILES);
     if (lastReturn.code !== 0) {

Makefile.js

@@ -27,7 +27,7 @@
     "chai": "^1.10.0",
     "eslint": "^5.7.0",
     "eslint-config-eslint": "^5.0.1",
-    "eslint-plugin-node": "^7.0.1",
+    "eslint-plugin-node": "^8.0.0",
     "eslint-release": "^1.0.0",
     "esprima": "latest",
     "esprima-fb": "^8001.2001.0-dev-harmony-fb",