Release rcrossref v0.7.0 · ropensci/rcrossref

All text mining functionality moved into a new package: crminer
https://github.com/ropensci/crminer . Functions that did
text mining stuff now defunct, see ?rcrossref-defunct (#122)
All Crossref API requests now using https instead of http (#133)

replace xml2::xml_find_one with xml2::xml_find_first (#128)
thanks @njahn82
replaced httr with crul for HTTP requests (#132)
Now using markdown for documentation (#135)
Added more documentation to cr_journals and cr_works
about what the returned data fields backfile_dois and current_dois
really mean (#105) thanks @SteveViss

Fix to cr_prefixes to not fail when no results found (#130)
thanks @globbestael
Fixed cr_works to allow queries like facet = license:* to be
passed to facet parameter (was always allowed by Crossref, but we
neglected to allow it - previously only allowed a boolean) (#129)
Fixed cr_funders and cr_journals to give back facet data along
with other data (#134)
Fix to cr_* functions to check for a missing content-type
headers and instead of failing, we continue anyway and try to parse
data as sometimes Crossref doesn't give back a content type header
at all (#127)

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