Added support for Historical Count Endpoint

Author: nishant-shrimpy

README.md

@@ -447,6 +447,19 @@ asset_popularity = client.get_asset_popularity()
 
 ### Historical Methods
 
+* [`get_historical_count`](https://developers.shrimpy.io/docs/#get-historical-count)
+
+```python
+count = client.get_historical_count(
+    'trade',
+    'Bittrex',
+    'LTC',
+    'BTC',
+    '2019-05-19T01:00:00.000Z',
+    '2019-05-20T02:00:00.000Z'
+)
+```
+
 * [`get_historical_instruments`](https://developers.shrimpy.io/docs/#get-historical-instruments)
 
 ```python

setup.py

@@ -13,7 +13,7 @@
 
 setuptools.setup(
     name="shrimpy_python",
-    version="0.0.10",
+    version="0.0.11",
     author="ShrimpyOfficial",
     author_email="[email protected]",
     description="The Official Shrimpy API Python Client",

shrimpy/shrimpy_api_client.py

@@ -433,6 +433,24 @@ def get_historical_instruments(self, exchange=None, base_trading_symbol=None, qu
         return self._call_endpoint('GET', query_string)
 
 
+    def get_historical_count(self, data_type, exchange, base_trading_symbol, quote_trading_symbol, start_time, end_time):
+        endpoint = 'historical/count'
+        params = {
+            'type': data_type,
+            'exchange': exchange,
+            'baseTradingSymbol': base_trading_symbol,
+            'quoteTradingSymbol': quote_trading_symbol,
+            'startTime': start_time,
+            'endTime': end_time
+        }
+        query_string = self._create_query_string(
+            endpoint,
+            params
+        )
+
+        return self._call_endpoint('GET', query_string)
+
+
     ##############
     # Management #
     ##############