Fix Proc::Async not finding prove.bat on windows
Fix Proc::Async not finding prove.bat on windows

niner/panda,will-crawford/panda,masak/panda,tadzik/panda,skaji/panda,stmuk/panda,perlpilot/panda,stmuk/panda,sjn/panda,moznion/panda,skaji/panda,masak/panda,moznion/panda,shoichikaji/panda,perlpilot/panda,tadzik/panda,sjn/panda,hoelzro/panda,timo/panda,tadzik/panda,jonathanstowe/panda,TimToady/panda,will-crawford/panda,hoelzro/panda,laben/panda,shoichikaji/panda,laben/panda,timo/panda,hoelzro/panda,nbrown/panda,niner/panda,jonathanstowe/panda,nbrown/panda,TimToady/panda,sjn/panda