function isSemVer
isSemVer(value: unknown): value is SemVerChecks to see if value is a valid SemVer object. It does a check into each field including prerelease and build.
Some invalid SemVer sentinels can still return true such as ANY and INVALID. An object which has the same value as a sentinel but isn't reference equal will still fail.
Objects which are valid SemVer objects but have extra fields are still considered SemVer objects and this will return true.
A type assertion is added to the value.
Parameters
value: unknownThe value to check to see if its a valid SemVer object
Return Type
value is SemVerTrue if value is a valid SemVer otherwise false