Bump stylelint from 13.7.0 to 13.7.1 (#439)

Bumps [stylelint](https://github.com/stylelint/stylelint) from 13.7.0 to 13.7.1.
- [Release notes](https://github.com/stylelint/stylelint/releases)
- [Changelog](https://github.com/stylelint/stylelint/blob/master/CHANGELOG.md)
- [Commits](stylelint/stylelint@13.7.0...13.7.1)

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

package.json

@@ -49,7 +49,7 @@
     "postcss-cli": "^7.1.2",
     "purgecss": "^2.3.0",
     "shx": "^0.3.2",
-    "stylelint": "^13.7.0",
+    "stylelint": "^13.7.1",
     "stylelint-config-twbs-bootstrap": "^2.0.3",
     "svg-sprite": "^1.5.0",
     "svgo": "^1.3.2",