Bump codemirror from 5.47.0 to 5.48.0 (#91)

Bumps [codemirror](https://github.com/codemirror/CodeMirror) from 5.47.0 to 5.48.0.
- [Release notes](https://github.com/codemirror/CodeMirror/releases)
- [Changelog](https://github.com/codemirror/CodeMirror/blob/master/CHANGELOG.md)
- [Commits](codemirror/codemirror5@5.47.0...5.48.0)

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

package.json

@@ -16,7 +16,7 @@
     "bootstrap": "^4.3.1",
     "brace": "^0.11.1",
     "clipboard": "^2.0.4",
-    "codemirror": "^5.47.0",
+    "codemirror": "^5.48.0",
     "element-ui": "^2.7.2",
     "emojify.js": "^1.1.0",
     "emojione": "^4.5.0",