upgrade deps and readme

README.md

@@ -57,8 +57,8 @@ var tileIndex = geojsonvt(data, {
 	maxZoom: 14,  // max zoom to preserve detail on; can't be higher than 24
 	tolerance: 3, // simplification tolerance (higher means simpler)
 	extent: 4096, // tile extent (both width and height)
-	buffer: 64,	  // tile buffer on each side
-	debug: 0,      // logging level (0 to disable, 1 or 2)
+	buffer: 64,   // tile buffer on each side
+	debug: 0,     // logging level (0 to disable, 1 or 2)
 	lineMetrics: false, // whether to enable line metrics tracking for LineString/MultiLineString features
 	promoteId: null,    // name of a feature property to promote to feature.id. Cannot be used with `generateId`
 	generateId: false,  // whether to generate feature ids. Cannot be used with `promoteId`
@@ -88,5 +88,5 @@ const geojsonvt = require('geojson-vt');
 Or use a browser build directly:
 
 ```html
-<script src="https://unpkg.com/geojson-vt@3.1.4/geojson-vt.js"></script>
+<script src="https://unpkg.com/geojson-vt@3.2.0/geojson-vt.js"></script>
 ```

package.json

@@ -20,12 +20,12 @@
   "unpkg": "geojson-vt.js",
   "devDependencies": {
     "benchmark": "^2.1.4",
-    "coveralls": "^3.0.1",
-    "eslint": "^4.19.1",
+    "coveralls": "^3.0.2",
+    "eslint": "^5.2.0",
     "eslint-config-mourner": "^2.0.3",
-    "esm": "^3.0.49",
+    "esm": "^3.0.72",
     "nyc": "^12.0.2",
-    "rollup": "^0.60.2",
+    "rollup": "^0.63.4",
     "rollup-plugin-uglify": "^4.0.0",
     "tape": "^4.9.1",
     "watchify": "^3.11.0"