Update conf.py to 0.5.2

Author: TomSlater

docs/conf.py

@@ -20,13 +20,13 @@
 # -- Project information -----------------------------------------------------
 
 project = 'ParticleSpy'
-copyright = '2020, ePSIC'
+copyright = '2021, ePSIC'
 author = 'ePSIC'
 
 # The short X.Y version
-version = '0.5.1'
+version = '0.5.2'
 # The full version, including alpha/beta/rc tags
-release = '0.5.1'
+release = '0.5.2'
 
 
 # -- General configuration ---------------------------------------------------