Bump shelljs from 0.7.8 to 0.8.5 in /code/a10-web-front

Bumps [shelljs](https://github.com/shelljs/shelljs) from 0.7.8 to 0.8.5.
- [Release notes](https://github.com/shelljs/shelljs/releases)
- [Changelog](https://github.com/shelljs/shelljs/blob/master/CHANGELOG.md)
- [Commits](shelljs/shelljs@v0.7.8...v0.8.5)

---
updated-dependencies:
- dependency-name: shelljs
  dependency-type: direct:development
...

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

Author: dependabot[bot]

code/a10-web-front/package-lock.json

@@ -81,7 +81,7 @@
     "sass-loader": "6.0.6",
     "script-loader": "^0.7.2",
     "semver": "5.4.1",
-    "shelljs": "0.7.8",
+    "shelljs": "0.8.5",
     "svg-sprite-loader": "3.5.2",
     "uglifyjs-webpack-plugin": "1.1.3",
     "url-loader": "0.6.2",