draft.kings 0.5.5

Fixed issue in dk_prepare_schematic() introduced when using player position instead of roster slot id
Updated vignettes and README
Removed jsonlite from imports
Added GitHub Actions workflows for documentation and testing

draft.kings 0.5.4

Added pkgdown site and udpated README
Removed dk_get() and dk_multi_get()
Renamed functions like dk_request_*() to dk_req_*()
Renamed functions like dk_response_*() to dk_resp_*()
Replaced cookies_file argument with iv and jwe arguments to functions that require DraftKings session cookies