Bump @babel/plugin-transform-runtime from 7.8.3 to 7.9.0 (#307)

Bumps [@babel/plugin-transform-runtime](https://github.com/babel/babel) from 7.8.3 to 7.9.0.
- [Release notes](https://github.com/babel/babel/releases)
- [Changelog](https://github.com/babel/babel/blob/master/CHANGELOG.md)
- [Commits](https://github.com/babel/babel/compare/v7.8.3...v7.9.0)

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package.json

@@ -40,7 +40,7 @@
  },
  "devDependencies": {
   "@babel/core": "^7.8.7",
-  "@babel/plugin-transform-runtime": "^7.8.3",
+  "@babel/plugin-transform-runtime": "^7.9.0",
   "@vue/component-compiler-utils": "^3.1.1",
   "@vue/test-utils": "^1.0.0-beta.29",
   "babel-core": "^7.0.0-bridge.0",