Update setup.cfg

Author: MMathisLab

setup.cfg

@@ -12,7 +12,7 @@ url = https://github.com/AdaptiveMotorControlLab/CEBRA
 project_urls =
     Bug Tracker = https://github.com/AdaptiveMotorControlLab/CEBRA/issues
 classifiers =
-    Development Status :: 5 - Production/Stable
+    Development Status :: 4 - Beta
     Environment :: GPU :: NVIDIA CUDA
     Intended Audience :: Science/Research
     Operating System :: OS Independent