Mark as version 5.57.7

Yukaii · Yukaii · commit 693a8c5b865b · 2021-03-09T17:19:00.000+08:00
diff --git a/package.json b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@hackmd/codemirror",
-  "version": "5.57.6",
+  "version": "5.57.7",
   "main": "lib/codemirror.js",
   "style": "lib/codemirror.css",
   "author": {
