Fix #1597
Fix #1597

Change the type from string to int for GitVersion properties "PreReleaseNumber" and "CommitsSinceVersionSource"

vlesierse/cake,adamhathcock/cake,vlesierse/cake,daveaglick/cake,thomaslevesque/cake,Sam13/cake,robgha01/cake,devlead/cake,Julien-Mialon/cake,gep13/cake,patriksvensson/cake,Julien-Mialon/cake,devlead/cake,DixonD-git/cake,gep13/cake,mholo65/cake,cake-build/cake,cake-build/cake,robgha01/cake,Sam13/cake,patriksvensson/cake,thomaslevesque/cake,adamhathcock/cake,mholo65/cake,ferventcoder/cake,daveaglick/cake,ferventcoder/cake