Move Statistics to extras

Author: cscherrer

Project.toml

@@ -12,7 +12,6 @@ MLStyle = "d8e11817-5142-5d16-987a-aa16d5891078"
 MappedArrays = "dbb5928d-eab1-5f90-85c2-b9b0edb7c900"
 NamedTupleTools = "d9ec5142-1e00-5aa0-9d6a-321866360f50"
 Random = "9a3f8284-a2c9-5f02-9a11-845980a1fd5c"
-Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 Tricks = "410a4b4d-49e4-4fbc-ab6d-cb71b17b3775"
 
 [compat]
@@ -24,6 +23,7 @@ julia = "1.3"
 
 [extras]
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
+Statistics = "10745b16-79ce-11e8-11f9-7d13ad32a3b2"
 
 [targets]
-test = ["Test"]
+test = ["Test", "Statistics"]