fix k>3, add eslint

Author: caub

.eslintrc

@@ -0,0 +1,22 @@
+{
+  "extends": [
+    "eslint:recommended"
+  ],
+  "env": {
+    "browser": true,
+    "node": true,
+    "es6": true
+  },
+  "parserOptions": {
+    "ecmaVersion": 2018,
+    "sourceType": "module"
+  },
+  "rules": {
+    "no-console": "warn",
+    "max-len": [
+      "warn",
+      180,
+      4
+    ]
+  }
+}

ktree.mjs

@@ -92,7 +92,7 @@ export const ktree = k => {
         : {
           n,
           items: [],
-          ...keys.reduce((o, key) => ({ ...o, [key]: buildTree(depth, n + 1) }), {})
+          ...KEYS.reduce((o, key) => ({ ...o, [key]: buildTree(depth, n + 1) }), {})
         };
     getNeighbors = (decs, N) => {
       const nodes = [];

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ktree",
-  "version": "3.0.3",
+  "version": "3.0.4",
   "description": "Efficient tree search in k-dimensions",
   "main": "dist/ktree.cjs.js",
   "browser": "dist/ktree.umd.js",
@@ -41,6 +41,7 @@
     "color-name-list": "^3.45.0",
     "color-names": "^2.0.0",
     "color-tf": "^5.1.2",
+    "eslint": "^4.19.1",
     "nyc": "^11.8.0",
     "rollup": "^0.59.2",
     "rollup-plugin-babel": "^4.0.0-beta.4"