move vue to devDependencies and peerDependencies

Author: TitanSnow

package.json

@@ -23,8 +23,7 @@
     "highlight.js": "^9.12.0",
     "katex": "^0.9.0",
     "lodash": "^4.17.4",
-    "markdown-it": "^8.4.1",
-    "vue": "^2.5.11"
+    "markdown-it": "^8.4.1"
   },
   "devDependencies": {
     "@babel/plugin-syntax-jsx": "^7.0.0-beta.53",
@@ -42,6 +41,10 @@
     "rollup-plugin-vue": "^4.3.1",
     "stylus": "^0.54.5",
     "stylus-loader": "^3.0.2",
+    "vue": "^2.5.11",
     "vue-template-compiler": "^2.5.16"
+  },
+  "peerDependencies": {
+    "vue": "^2.5.11"
   }
 }