Bump typeorm from 0.2.20 to 0.3.0

Bumps [typeorm](https://github.com/typeorm/typeorm) from 0.2.20 to 0.3.0.
- [Release notes](https://github.com/typeorm/typeorm/releases)
- [Changelog](https://github.com/typeorm/typeorm/blob/master/CHANGELOG.md)
- [Commits](typeorm/typeorm@0.2.20...0.3.0)

---
updated-dependencies:
- dependency-name: typeorm
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package.json

@@ -10,7 +10,7 @@
       "prismjs": "^1.6.0",
       "reflect-metadata": "^0.1.10",
       "showdown": "^1.7.4",
-      "typeorm": "0.2.20",
+      "typeorm": "0.3.0",
       "vue": "^2.4.2",
       "vue-router": "^2.7.0"
    },