package_search: fails on older versions of CKAN (e.g. 2.2) with params not allowed

[sckott]

ckanr_setup("http://search.geothermaldata.org")
x <- package_search(q = '*:*', rows = 1)
#> Error: 400 - Search Query Error
#>   message Search Query is invalid: "Invalid search parameters: 
#>   ['use_default_schema', 'include_drafts', 'include_private']"

those params aren't in the package_search route in that CKAN version https://docs.ckan.org/en/ckan-2.2.3/api.html

probably need to

• get CKAN installation version on user running ckanr_setup()
  • if they just pass a URL to a fxn call, then we need to call ckan_version() to get the version
• then remove params not supported for diff. versions as needed
• then do http request