CompatHelper: bump compat for AlphaVantage to 0.4, (keep existing compat)

Author: CompatHelper Julia

Project.toml

@@ -21,7 +21,7 @@ Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 StatsBase = "2913bbd2-ae8a-5f71-8c99-4fb6c76f3a91"
 
 [compat]
-AlphaVantage = "0.3"
+AlphaVantage = "0.3, 0.4"
 CSV = "0.8"
 Dash = "0.1"
 DashCoreComponents = "1.17"