vue-cli 3.x jsx 支持

"devDependencies": { "@babel/plugin-syntax-dynamic-import": "^7.2.0", "@vue/babel-helper-vue-jsx-merge-props": "^1.0.0", "@vue/babel-preset-jsx": "^1.1.1", "@vue/cli-plugin-babel": "^4.0.0", "@vue/cli-plugin-typescript": "^4.0.0", "@vue/cli-service": "^4.0.0", "@babel/cli": "^7.1.2", "@babel/core": "^7.1.2", "@babel/preset-env": "^7.1.0", "node-sass": "^4.12.0", "sass-loader": "^8.0.0", "typescript": "~3.5.3", "vue-template-compiler": "^2.6.10" }