[skip ci] fixing version

Author: dlockhart

package.json

@@ -24,7 +24,7 @@
     "frau-ci": "^1",
     "node-sass": "^4"
   },
-  "version": "5.7.0",
+  "version": "5.6.4",
   "main": "d2l-button.js",
   "dependencies": {
     "@brightspace-ui/core": "^1",