put SDK version in a common place

Author: UmanShahzad

ipinfo/handler_utils.py

@@ -6,14 +6,17 @@
 import os
 import sys
 
+from .version import SDK_VERSION
+
 API_URL = "https://ipinfo.io"
 COUNTRY_FILE_DEFAULT = "countries.json"
 
 def get_headers(access_token):
     """Build headers for request to IPinfo API."""
     headers = {
-        "user-agent": "IPinfoClient/Python{version}/4.0.0".format(
-            version=sys.version_info[0]
+        "user-agent": "IPinfoClient/Python{version}/{sdk_version}".format(
+            version=sys.version_info[0],
+            sdk_version=SDK_VERSION
         ),
         "accept": "application/json",
     }

ipinfo/version.py

@@ -0,0 +1 @@
+SDK_VERSION = '4.1.0'

setup.py

@@ -1,5 +1,7 @@
 from setuptools import setup
 
+from ipinfo.version import SDK_VERSION
+
 long_description = """
 The official Python library for IPinfo.
 
@@ -10,7 +12,7 @@
 
 setup(
     name="ipinfo",
-    version="4.0.0",
+    version=SDK_VERSION,
     description="Official Python library for IPInfo",
     long_description=long_description,
     url="https://github.com/ipinfo/python",