:+1: version and update docs

CHANGES.md

@@ -1,6 +1,10 @@
 CHANGES
 ========
 
+## 1.2.1
+
+* Fix: buildIndex error occured when access to installer
+
 ## 1.2.0
 
 * Support: Merge official Crowi v1.6.2

package.json

@@ -1,6 +1,6 @@
 {
   "name": "crowi-plus",
-  "version": "1.2.0-RC",
+  "version": "1.2.1-RC",
   "description": "Enhanced Crowi",
   "tags": [
     "wiki",