fixed dev status & py version

Author: CodingSamrat

setup.cfg

@@ -12,13 +12,13 @@ project_urls =
     Repository = https://github.com/FileXdb/FileXdb-Python
     Bug Tracker = https://github.com/FileXdb/FileXdb-Python/issues
 classifiers =
-    Development Status :: Beta
+    Development Status :: 4 - Beta
     Programming Language :: Python :: 3
     License :: OSI Approved :: MIT License
     Operating System :: OS Independent
 
 
 [options]
 packages = find:
-python_requires = 3.7 or above
+python_requires = >=3.7