Update specs2-core, specs2-scalacheck, ... to 4.7.0
Update specs2-core, specs2-scalacheck, ... to 4.7.0

slamdata/quasar,quasar-analytics/quasar,quasar-analytics/quasar,quasar-analytics/quasar,quasar-analytics/quasar,djspiewak/quasar