message: Minor formatting fix in README.md
  Github treats the sentence "This key is optional..." as part of the bullet point from the previous line, which is not what was intended. Inserting a blank line in between fixes the problem.
diff: @@ -195,6 +195,7 @@ There are two types of configuration that `wrangler` uses: global user and per p
  - `route`: This is the route you'd like to use your worker on. You need to include the hostname. Examples:
  - `*example.com/*`
  - `http://example.com/hello`
  +
  This key is optional if you are using a workers.dev subdomain and is only required for `publish --release`.
  - `webpack_config`: This is the path to the webpack configuration file for your worker. This is optional and
  defaults to `webpack.config.js`
  