Merge pull request #178 from JuliaAI/dev

bump 3.0.0

Author: ablaom

Project.toml

@@ -1,7 +1,7 @@
 name = "ScientificTypes"
 uuid = "321657f4-b219-11e9-178b-2701a2544e81"
 authors = ["Anthony D. Blaom <[email protected]>"]
-version = "2.3.3"
+version = "3.0.0"
 
 [deps]
 CategoricalArrays = "324d7699-5711-5eae-9e2f-1d82baa6b597"