extend compat MLJ, MLJModels and bump version

Author: ablaom

Project.toml

@@ -1,7 +1,7 @@
 name = "MLJTestIntegration"
 uuid = "697918b4-fdc1-4f9e-8ff9-929724cee270"
 authors = ["Anthony D. Blaom <anthony.blaom@gmail.com>"]
-version = "0.5.2"
+version = "0.5.6"
 
 [deps]
 MLJ = "add582a8-e3ab-11e8-2d5e-e98b27df1bc7"
@@ -12,8 +12,8 @@ Pkg = "44cfe95a-1eb2-52ea-b672-e2afdf69b78f"
 Test = "8dfed614-e22c-5e08-85e1-65c5234f0b40"
 
 [compat]
-MLJ = "0.18, 0.19, 0.20"
-MLJModels = "0.16, 0.17"
+MLJ = "0.18, 0.19, 0.20, 0.21"
+MLJModels = "0.16, 0.17, 0.18"
 MLJTestInterface = "0.2.4"
 NearestNeighborModels = "0.2"
 Pkg = "<0.0.1, 1"