Fix require (for VERSION) in gemspec
Fix require (for VERSION) in gemspec

nyxcharon/sensu-plugins-vault,kelcecil/sensu-plugins-bitbucket,sensu-plugins/sensu-plugin,nyxcharon/sensu-plugins-last-modified,somic/sensu-plugin,nyxcharon/sensu-plugins-fleet,zbintliff/sensu-plugin,nyxcharon/sensu-plugins-quay,upfluence/sensu-plugin,nyxcharon/sensu-plugins-bitbucket