Properly increase the version number

Author: jmfernandez

CITATION.cff

@@ -22,4 +22,4 @@ message: "If you use this software, please cite it using these metadata."
 repository-code: "https://github.com/inab/WfExS-backend"
 type: software
 title: "WfExS-backend"
-version: 0.5.1
+version: 0.5.3

wfexs_backend/__init__.py

@@ -20,7 +20,7 @@
 __license__ = 'Apache 2.0'
 
 # https://www.python.org/dev/peps/pep-0396/
-__version__ = '0.5.1'
+__version__ = '0.5.3'
 
 def describeGitRepo(repo):
     """Describe the repository version.