Change to use semantic versioning

Author: jessdelacruzsantos

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Change Log
 
-## Version 3.3.0-20191217 (2019-12-17)
+## Version 4.0.0-20191217 (2019-12-17)
 !!!important
 Square is excited to announce the public release of customized SDKs for [Java](https://github.com/square/square-java-sdk) and [.NET](https://github.com/square/square-dotnet-sdk). For more information, see [Square SDKs](/sdks).
 !!!
@@ -9,8 +9,8 @@ Square is excited to announce the public release of customized SDKs for [Java](h
 
 * __Beta release:__ SDKs updated to support the new [CashDrawerShifts](cashdrawershift-api/reporting) API.
 
-* Square now follows the semantic versioning scheme that uses three numbers to delineate MAJOR, MINOR, and PATCH versions of our SDK. In addition, the SDK version also includes the API version so you know what Square API version the SDK is related to. For more information, see [Versioning and SDKs](build-basics/versioning-overview#versioning-and-sdks).
-
+* Square now follows the semantic versioning scheme for all SDKs except PHP and Node.js. This versioning scheme uses three numbers to delineate MAJOR, MINOR, and PATCH versions of our SDK. In addition, the SDK version also includes the API version so you know what Square API version the SDK is related to. For more information, see [Versioning and SDKs](build-basics/versioning-overview#versioning-and-sdks).
+* Java, .Net, Python, and Ruby SDKs are now version 4.0.0. Java and .Net SDKs have breaking changes in version 4.0.0. Ruby and Python do not have breaking changes.
 
 ## Version 3.20191120.0 (2019-11-20)
 !!!important

setup.py

@@ -12,7 +12,7 @@
 
 setup(
     name='squareup',
-    version='3.3.0.20191217',
+    version='4.0.0.20191217',
     description='Use Square APIs to manage and run business including payment, customer, product, inventory, and employee management.',
     long_description=long_description,
     long_description_content_type="text/markdown",

square/api/base_api.py

@@ -20,7 +20,7 @@ class BaseApi(object):
     """
 
     global_headers = {
-        'user-agent': 'Square-Python-SDK/3.3.0.20191217',
+        'user-agent': 'Square-Python-SDK/4.0.0.20191217',
         'Square-Version': '2019-12-17'
     }
 

square/client.py

@@ -29,7 +29,7 @@ class Client(object):
 
     @staticmethod
     def sdk_version():
-        return '3.3.0.20191217'
+        return '4.0.0.20191217'
 
     @staticmethod
     def square_version():