Changed input type from float tu Number

tools/exchange_rates.py

@@ -10,7 +10,7 @@ BASE_URL = "https://api.currencyfreaks.com/v2.0/rates/latest"
 class ExchangeRatesTool(Tool):
     name = "exchange_rates"
     description = "Converts an amount from one currency to another using the latest exchange rates."
-    inputs = {'amount': {'type': 'float', 'description': 'The amount to convert.'},
+    inputs = {'amount': {'type': 'number', 'description': 'The amount to convert.'},
               'from_currency': {'type': 'string', 'description': 'The currency to convert from.'},
               'to_currency': {'type': 'string', 'description': 'The currency to convert to.'}}
     output_type = "string"