fix: docstrings, review changes

Author: dshemetov

Diff for: DESCRIPTION

@@ -50,7 +50,9 @@ Imports:
     vctrs
 Suggests:
     covidcast,
+    devtools,
     epidatr,
+    here,
     knitr,
     outbreaks,
     rmarkdown,

Diff for: NAMESPACE

@@ -6,7 +6,6 @@ S3method(as_epi_df,data.frame)
 S3method(as_epi_df,epi_df)
 S3method(as_epi_df,tbl_df)
 S3method(as_epi_df,tbl_ts)
-S3method(as_of,epi_archive)
 S3method(as_tibble,epi_df)
 S3method(as_tsibble,epi_df)
 S3method(autoplot,epi_df)
@@ -45,7 +44,6 @@ export(archive_cases_dv_subset)
 export(arrange)
 export(as_epi_archive)
 export(as_epi_df)
-export(as_of)
 export(as_tsibble)
 export(autoplot)
 export(clone)
@@ -154,6 +152,7 @@ importFrom(rlang,arg_match)
 importFrom(rlang,as_label)
 importFrom(rlang,caller_arg)
 importFrom(rlang,caller_env)
+importFrom(rlang,check_dots_empty)
 importFrom(rlang,enquo)
 importFrom(rlang,enquos)
 importFrom(rlang,env)