Update cryptocurrency plugin to new CMC API

Author: linuxdaemon

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Add the factoid character in the listfacts output
 ### Changed
 - Cleaned up the timeformat API and implementation (#32)
+- Updated cryptocurrency to new CoinMarketCap API
 ### Fixed
 - Disconnect active vs configured channel lists (#11)
 - Fix reminder tests time based errors

config.default.json

@@ -109,7 +109,8 @@
         "lyricsnmusic": "",
         "cleverbot": "",
         "brewerydb": "",
-        "alphavantage": ""
+        "alphavantage": "",
+        "coinmarketcap": ""
     },
     "database": "sqlite:///cloudbot.db",
     "plugin_loading": {