Update rehype-minify-whitespace

Author: wooorm

package.json

@@ -30,7 +30,7 @@
     "hast-util-has-property": "^1.0.0",
     "hast-util-is-element": "^1.0.0",
     "hast-util-to-string": "^1.0.0",
-    "rehype-minify-whitespace": "^1.1.0",
+    "rehype-minify-whitespace": "^2.0.0",
     "unist-util-visit": "^1.1.1",
     "xtend": "^4.0.1"
   },