move ember-cli-eslint to dev deps

Author: Kelly Selden

package.json

@@ -28,7 +28,6 @@
     "core-object": "^2.0.5",
     "debug": "^2.2.0",
     "ember-cli-babel": "^5.1.7",
-    "ember-cli-eslint": "^3.0.2",
     "ember-cli-version-checker": "^1.3.1",
     "express": "^4.8.5",
     "fastboot": "1.0.0-rc.6",
@@ -49,6 +48,7 @@
     "ember-cli": "2.12.0-beta.1",
     "ember-cli-addon-tests": "^0.6.0",
     "ember-cli-dependency-checker": "^1.3.0",
+    "ember-cli-eslint": "^3.0.2",
     "ember-cli-htmlbars": "^1.1.1",
     "ember-cli-htmlbars-inline-precompile": "^0.3.3",
     "ember-cli-inject-live-reload": "^1.4.1",