Update redis plugin to 0.1.0-beta.4

Author: lukemelia

package.json

@@ -21,7 +21,7 @@
     "ember-cli-deploy-build": "0.1.0-beta.1",
     "ember-cli-deploy-display-revisions": "0.0.1",
     "ember-cli-deploy-gzip": "0.1.0-beta.1",
-    "ember-cli-deploy-redis": "0.1.0-beta.3",
+    "ember-cli-deploy-redis": "0.1.0-beta.4",
     "ember-cli-deploy-s3": "0.1.0-beta.1",
     "ember-cli-deploy-manifest": "0.1.0-beta.1",
     "ember-cli-deploy-revision-data": "0.1.0-beta.3"