fix: tell bundlers to return false for node dns module (#163)

Author: achingbrain

package.json

@@ -31,6 +31,9 @@
   "license": "MIT",
   "bugs": "https://github.com/multiformats/js-multiaddr/issues",
   "homepage": "https://github.com/multiformats/js-multiaddr",
+  "browser": {
+    "dns": false
+  },
   "dependencies": {
     "cids": "^1.0.0",
     "class-is": "^1.1.0",