Apply suggestion from @dsweber2

Author: dsweber2

NEWS.md

@@ -13,7 +13,8 @@
 - `pub_covidcast_meta` now returns `min_time`, `max_time`, `max_issue` as
   integers rather than Dates. Because these fields can mix YYYYMMDD and YYYYWW
   values, we recommend you parse them yourself.
-
+ - add new fields for `flusurv` endpoint.
+  
 # epidatr 1.2.1
 
 ## Patches