Merge pull request #21 from 7rulnik/master

Add eslint@6 to peerDeps

Author: mthadley

package.json

@@ -16,7 +16,7 @@
     "format": "prettier --write \"{lib,tests}/**/*.js\""
   },
   "peerDependencies": {
-    "eslint": "^3.0.0 || ^4.0.0 || ^5.0.0"
+    "eslint": "^3.0.0 || ^4.0.0 || ^5.0.0 || ^6.0.0"
   },
   "dependencies": {
     "natural-compare-lite": "^1.4.0"