Update grains for elm-test 0.18.3 compatibility

exercises/grains/elm-package.json

@@ -8,9 +8,7 @@
     ],
     "exposed-modules": [],
     "dependencies": {
-        "elm-lang/core": "5.0.0 <= v < 6.0.0",
-        "elm-community/elm-test": "3.0.0 <= v < 4.0.0",
-        "rtfeldman/node-test-runner": "3.0.0 <= v < 4.0.0"
+        "elm-lang/core": "5.0.0 <= v < 6.0.0"
     },
     "elm-version": "0.18.0 <= v < 0.19.0"
 }

exercises/grains/package.json

@@ -4,10 +4,10 @@
     "license": "MIT",
     "scripts": {
         "postinstall": "elm-package install -y",
-        "test": "elm-test Tests.elm"
+        "test": "elm-test"
     },
     "dependencies": {
-        "elm": "^0.18.0",
-        "elm-test": "^0.18.0"
+        "elm": "0.18.0",
+        "elm-test": "0.18.3"
     }
 }

exercises/grains/tests/Tests.elm

@@ -1,10 +1,9 @@
-port module Main exposing (..)
+module Tests exposing (..)
 
-import Test.Runner.Node exposing (run, TestProgram)
-import Json.Encode exposing (Value)
-import Test exposing (..)
 import Expect
 import Grains exposing (square)
+import Json.Encode exposing (Value)
+import Test exposing (..)
 
 
 tests : Test
@@ -29,11 +28,3 @@ tests =
                 \() -> Expect.equal Nothing (square -1)
             ]
         ]
-
-
-main : TestProgram
-main =
-    run emit tests
-
-
-port emit : ( String, Value ) -> Cmd msg

exercises/grains/tests/elm-package.json

@@ -0,0 +1,16 @@
+{
+    "version": "3.0.0",
+    "summary": "Exercism problems in Elm.",
+    "repository": "https://github.com/exercism/xelm.git",
+    "license": "BSD3",
+    "source-directories": [
+        ".",
+        ".."
+    ],
+    "exposed-modules": [],
+    "dependencies": {
+        "elm-lang/core": "5.0.0 <= v < 6.0.0",
+        "elm-community/elm-test": "4.0.0 <= v < 5.0.0"
+    },
+    "elm-version": "0.18.0 <= v < 0.19.0"
+}