Remove support for python 3.7

Author: duckduckgrayduck

docs/changelog.rst

@@ -1,6 +1,10 @@
 Changelog
 ---------
 
+4.4.0
+~~~~~
+* Removes support for Python 3.7. 
+
 4.3.0
 ~~~~~
 * Uses python-squarelet to client handle authentication.

setup.py

@@ -7,7 +7,7 @@
 
 setup(
     name="python-documentcloud",
-    version="4.3.0",
+    version="4.4.0",
     description="A simple Python wrapper for the DocumentCloud API",
     author="Mitchell Kotler",
     author_email="mitch@muckrock.com",
@@ -49,7 +49,6 @@
         "Intended Audience :: Developers",
         "Operating System :: OS Independent",
         "License :: OSI Approved :: MIT License",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",