v5.0.0-rc.1

Updated testing and handling of FileVersion
This takes a diversion from the official CSemVer stie behavior. The spec is silent on the FileVersion and ordered version support beyond stating that it is plausible. Sadly, it says nothing about how it should work, and the "playground" site get the file version ordering wrong. Thus, this implementation follows the spirit of the spec in that a CI build for a given release is always sorted lower than the actual release version of the same number.