Bump shx from 0.3.2 to 0.3.3 (#469)

Bumps [shx](https://github.com/shelljs/shx) from 0.3.2 to 0.3.3.
- [Release notes](https://github.com/shelljs/shx/releases)
- [Changelog](https://github.com/shelljs/shx/blob/master/CHANGELOG.md)
- [Commits](shelljs/shx@v0.3.2...v0.3.3)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

package-lock.json

@@ -48,7 +48,7 @@
     "npm-run-all": "^4.1.5",
     "postcss-cli": "^7.1.2",
     "purgecss": "^3.0.0",
-    "shx": "^0.3.2",
+    "shx": "^0.3.3",
     "stylelint": "^13.7.2",
     "stylelint-config-twbs-bootstrap": "^2.1.0",
     "svg-sprite": "^1.5.0",