Update master's version number to differentiate it

CMakeLists.txt

@@ -5,7 +5,7 @@ project(Kdenlive)
 
 # KDE Application Version, managed by release script
 set (KDE_APPLICATIONS_VERSION_MAJOR "15")
-set (KDE_APPLICATIONS_VERSION_MINOR "12")
+set (KDE_APPLICATIONS_VERSION_MINOR "13")
 set (KDE_APPLICATIONS_VERSION_MICRO "0")
 
 set(KDENLIVE_VERSION ${KDE_APPLICATIONS_VERSION_MAJOR}.${KDE_APPLICATIONS_VERSION_MINOR}.${KDE_APPLICATIONS_VERSION_MICRO})
@@ -52,7 +52,7 @@ if(NOT RELEASE_BUILD AND EXISTS ${CMAKE_SOURCE_DIR}/.git)
       OUTPUT_VARIABLE KDENLIVE_GIT_REVISION
       RETURN_VALUE TAG_RESULT
     )
-    
+
     # git log failed; maybe the repository was checked with depth=1.
     if(NOT ${TAG_RESULT} EQUAL 0)
       exec_program(${GIT_EXECUTABLE}