Bump project development status classifier to 4 - Beta

Author: MrLightful

pyproject.toml

@@ -11,7 +11,7 @@ readme = "README.md"
 keywords = ["braspag", "sdk", "python", "cielo", "api", "ecommerce", "brazil", "payments"]
 packages = [{include = "braspag_sdk"}]
 classifiers = [
-    'Development Status :: 3 - Alpha',
+    'Development Status :: 4 - Beta',
     'Intended Audience :: Developers',
     'Natural Language :: English',
     'License :: OSI Approved :: MIT License',