Add support for dependency ranges

[kryptt]

It is possible to use ivy dependency ranges in sbt. But when doing so, this plugin fails to validate latest versions against a project's specified ranges:

> dependencyUpdates

[info] Found 12 dependency updates for msw-backend
[info]   ch.qos.logback:logback-classic                       : [1.1,2.0[          -> 1.1.3
[info]   com.beachape:enumeratum                              : [1.1,2.0[          -> 1.3.0
[info]   com.github.alexarchambault:argonaut-shapeless_6.1    : [0.3,0.4[          -> 0.3.1
[info]   com.github.cb372:scalacache-guava                    : [0.5,1.0[          -> 0.6.4
[info]   me.lessis:courier                                    : [0.1,1.0[          -> 0.1.3
[info]   net.ceedubs:ficus                                    : [1.1,2.0[          -> 1.1.2
[info]   org.flywaydb:flyway-core                             : [3.2,4.0[          -> 3.2.1
[info]   org.mindrot:jbcrypt                                  : [0.2,1.0[          -> 0.3m 
[info]   org.scoverage:scalac-scoverage-plugin_2.11:provided  : 1.1.0     -> 1.1.1         
[info]   org.scoverage:scalac-scoverage-runtime_2.11:provided : 1.1.0     -> 1.1.1         
[info]   org.specs2:specs2-matcher-extra:test                 : [3.6,3.7[          -> 3.6.4
[info]   org.specs2:specs2-scalacheck:test                    : [3.6,3.7[          -> 3.6.4
[success] Total time: 47 s, completed Aug 11, 2015 3:49:55 PM

[rtimush]

Yes, it is a known problem similar to #9. Thanks for reporting.