Update unist-util-is

Author: wooorm

package.json

@@ -36,11 +36,11 @@
   ],
   "dependencies": {
     "comma-separated-tokens": "^1.0.0",
-    "property-information": "^5.3.0",
+    "property-information": "^5.0.0",
     "space-separated-tokens": "^1.0.0",
     "style-to-object": "^0.3.0",
-    "unist-util-is": "^3.0.0",
-    "web-namespaces": "^1.1.2"
+    "unist-util-is": "^4.0.0",
+    "web-namespaces": "^1.0.0"
   },
   "devDependencies": {
     "browserify": "^16.0.0",