Cannot install this package

[yuehhua]

I tried to install this package, but it failed due to compatibility.

(@v1.5) pkg> add GeneticVariation
  Resolving package versions...
ERROR: Unsatisfiable requirements detected for package KmerAnalysis [a20136b7]:
 KmerAnalysis [a20136b7] log:
 ├─possible versions are: [0.1.0, 0.2.0, 0.3.0, 0.4.0-0.4.4] or uninstalled
 ├─restricted to versions * by an explicit requirement, leaving only versions [0.1.0, 0.2.0, 0.3.0, 0.4.0-0.4.4]
 └─restricted by compatibility requirements with BioSequences [7e6ae17a] to versions: uninstalled — no versions left
   └─BioSequences [7e6ae17a] log:
     ├─possible versions are: [1.0.0, 1.1.0, 2.0.0-2.0.5] or uninstalled
     ├─restricted to versions * by an explicit requirement, leaving only versions [1.0.0, 1.1.0, 2.0.0-2.0.5]
     └─restricted by compatibility requirements with GeneticVariation [9bc6ac9d] to versions: [1.0.0, 1.1.0]
       └─GeneticVariation [9bc6ac9d] log:
         ├─possible versions are: 0.4.0 or uninstalled
         └─restricted to versions * by an explicit requirement, leaving only versions 0.4.0

[CiaranOMara]

Should be fixed by #31. Please feel free to reopen.