update and upgrade vuln in eslint

Author: ryanpeek

docs/site_libs/leaflet-providers-1.1.17/package.json

@@ -26,7 +26,7 @@
   ],
   "devDependencies": {
     "chai": "^4.1.2",
-    "eslint": "^3.16.1",
+    "eslint": ">=4.18.2",
     "eslint-plugin-html": "^2.0.1",
     "mocha": "^3.2.0",
     "mocha-phantomjs-core": "^2.1.1",