fix ^^ typo

package.json

@@ -5,6 +5,7 @@
   "main": "dist/index.js",
   "types": "dist/index.d.ts",
   "wechaty": {
+    "DEFAULT_HEAD": 0,
     "DEFAULT_PUPPET": "web",
     "DEFAULT_PROFILE": "demo",
     "DEFAULT_PROTOCOL": "io|0.0.1",
@@ -52,6 +53,7 @@
     "robot",
     "chatbot",
     "framework",
+    "sdk",
     "wechaty",
     "chatie",
     "微信控"
@@ -95,7 +97,7 @@
     "raven": "^2.2.1",
     "request": "^2.83.0",
     "retry-promise": "^1.0.0",
-    "rxjs": "^^5.4.3",
+    "rxjs": "^5.4.3",
     "state-switch": "^0.1.13",
     "ws": "^3.2.0",
     "xml2js": "^0.4.19"