fix: add acorn-jsx to avoid conflict in vuepress

Author: elevatebart

package.json

@@ -13,6 +13,7 @@
   },
   "dependencies": {
     "acorn": "^6.1.1",
+    "acorn-jsx": "^5.0.1",
     "buble": "^0.19.7",
     "lodash.debounce": "^4.0.8",
     "prismjs": "^1.16.0",

src/utils/getAst.js

@@ -1,7 +1,8 @@
-import { parse } from "acorn";
+var acorn = require("acorn");
+var jsx = require("acorn-jsx");
 
 export default function getAst(code) {
-  return parse(code, {
+  return acorn.Parser.extend(jsx()).parse(code, {
     ecmaVersion: 2019,
     sourceType: "module"
   });