www/ruby-faraday-retry: add package version 1.0.3

Required by newer ruby-faraday package.

Faraday Retry

The Retry middleware automatically retries requests that fail due to
intermittent client or server errors (such as network hiccups).

By default, it retries 2 times and handles only timeout exceptions.

It can be configured with an arbitrary number of retries, a list of
exceptions to handle, a retry interval, a percentage of randomness to add to
the retry interval, and a backoff factor.

The middleware can also handle the Retry-After header automatically when
configured with the right status codes (see below for an example).

(taca)