Changes
- invalid XML will now propagate errors to the parser (i.e. return
None) rather than panic (thanks @gperinazzo) - lower rust requirement to 1.39 (thanks @jangernert)
- turn off whitespace trimming (thanks @jangernert)
- smarter feed_id hash (link + title if available) (thanks @jangernert)
- update license to MIT only (thanks for pointing out the issue @ignatenkobrain)
- include fixture data in published crate (thanks for pointing out the issue @ignatenkobrain)