revert version

Author: PatReis

kgcnn/__init__.py

@@ -1,2 +1,2 @@
 # main package
-__kgcnn_version__ = "2.2.3"
+__kgcnn_version__ = "2.2.2"

setup.py

@@ -6,7 +6,7 @@
 
 setup(
     name="kgcnn",
-    version="2.2.3",  # If version is updated, change version in `kgcnn.__init__` too. (and update changelog)
+    version="2.2.2",  # If version is updated, change version in `kgcnn.__init__` too. (and update changelog)
     author="Patrick Reiser",
     author_email="patrick.reiser@kit.edu",
     description="General Base Layers for Graph Convolutions with tensorflow.keras",