README example for build-async-http-client (with async conn manager) is wrong

[ejschoen]

The example code shows passing false for the proxy-ignore-hosts parameter. It looks like it should be an empty sequence; else this is an exception: java.lang.IllegalArgumentException: Don't know how to create ISeq from: java.lang.Boolean exception from under clj-http.core/get-route-planner.

[dakrone]

@ejschoen thanks for noticing this, would you be able to open a PR for fixing this?

[ejschoen]

Done. #524.

[wmatson]

#531 fixes this a little differently (I ended up dropping the proxy params because they were optional).

[wmatson]

#531 has been merged