Update setup.py

Tag R-v1.5.0 is already taken.

Author: OndraMichal

package/setup.py

@@ -7,7 +7,7 @@
 
 setup(
     name='RFEM',
-    version='1.5.0',
+    version='1.5.1',
     description='Web Service&API project for RFEM',
     long_description=readme,
     long_description_content_type = "text/markdown",