Bump simple-line-icons from 2.4.1 to 2.5.2

Bumps [simple-line-icons](https://github.com/thesabbir/simple-line-icons) from 2.4.1 to 2.5.2.
- [Release notes](https://github.com/thesabbir/simple-line-icons/releases)
- [Changelog](https://github.com/thesabbir/simple-line-icons/blob/master/History.md)
- [Commits](thesabbir/simple-line-icons@2.4.1...2.5.2)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

package-lock.json

@@ -54,7 +54,7 @@
         "popper.js": "^1.16.1",
         "select2": "^4.0.13",
         "select2-bootstrap-theme": "0.1.0-beta.10",
-        "simple-line-icons": "^2.4.1",
+        "simple-line-icons": "^2.5.2",
         "simplemde": "^1.11.2",
         "source-sans-pro": "^3.6",
         "summernote": "^0.8.18",