Update minimum Python version to 3.8, SDK version to 3.0.0a1

Author: mcollins-ttd

pyproject.toml

@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "uid2_client"
-version = "2.4.6"
+version = "3.0.0a1"
 authors = [
     { name = "UID2 team", email = "unifiedid-admin@thetradedesk.com" }
 ]
@@ -18,7 +18,7 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
 ]
-requires-python = ">=3.6"
+requires-python = ">=3.8"
 dependencies = [
     "setuptools",
     "pycryptodome",