Build error

[ssnn]

@Julian Zhou

Info for build error below, see tigger issue #30

+ Rscript tests/setup/install_dep.R
Error in if (!all(df$available)) { : 
  missing value where TRUE/FALSE needed
Calls: installDep -> available.versions
In addition: Warning message:
In current.version(pkgs) :
  The current version and publication date of alakazam could not
                     be detected
Execution halted