(GH-552) Use earlier version of GitVersion
(GH-552) Use earlier version of GitVersion

After this version, 5.0.1, GitVersion started shipping as a single
contained executable, which means it no longer supports running with
Mono, and as a result, Cake.Recipe won't work on Unix systems.  To
enable support on these platforms, need to pin to this specific version.

cake-contrib/Cake.Recipe,cake-contrib/Cake.Recipe