Update unist-util-position

Closes GH-1.

Author: greenkeeperio-bot

package.json

@@ -24,7 +24,7 @@
     "hast-util-to-parse5": "^1.0.0",
     "html-void-elements": "^1.0.1",
     "parse5": "^2.2.3",
-    "unist-util-position": "^2.0.1",
+    "unist-util-position": "^3.0.0",
     "web-namespaces": "^1.0.0",
     "zwitch": "^1.0.0"
   },