New release tag

Its been a while since 0.4.1.

Lots of changes, here we mainly change release tag to mark the
important change in mesh handling (using variant instead of interface)

CMakeLists.txt

@@ -14,7 +14,7 @@ find_package(PkgConfig REQUIRED)
 #------------------------------------------------------
 
 # custom variable allowing to define version suffixes such as -rc*, -beta*, ...
-set(PUGS_VERSION "0.4.1")
+set(PUGS_VERSION "0.5.0")
 
 # deduce PUGS_SHORT_VERSION using regex
 string(REGEX MATCH "^[0-9]+\.[0-9]+\.[0-9]+" PUGS_SHORT_VERSION ${PUGS_VERSION})