covidcast endpoint returns only one geo for a multiple geo request

[dshemetov]

Same issue as #67,

library(epidatr)
library(magrittr)

covidcast("hhs", "confirmed_admissions_covid_1d", "day", "state", time_values = "20220101", c("al", "ca")) %>% request_url

produces https://delphi.cmu.edu/epidata//covidcast/?data_source=hhs&signals=confirmed_admissions_covid_1d&time_type=day&geo_type=state&time_values=20220101&geo_values=al%2C%20ca which has spaces in its geo_values argument, which gets parsed as a single geo in the server.

[dshemetov]

Ah nvm, I didn't reinstall this package since the bug fix.