Bump slugify from 1.6.5 to 1.6.6

Bumps [slugify](https://github.com/simov/slugify) from 1.6.5 to 1.6.6.
- [Release notes](https://github.com/simov/slugify/releases)
- [Changelog](https://github.com/simov/slugify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/simov/slugify/compare/v1.6.5...v1.6.6)

---
updated-dependencies:
- dependency-name: slugify
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

package.json

@@ -71,7 +71,7 @@
     "sass-loader": "^13.2.0",
     "shell-quote": "^1.7.4",
     "shelljs": "0.8.5",
-    "slugify": "^1.6.5",
+    "slugify": "^1.6.6",
     "source-code-pro": "^2.38.0",
     "source-map-loader": "^4.0.1",
     "source-sans-pro": "3.6.0",

yarn.lock

@@ -7955,10 +7955,10 @@ slide@^1.1.3, slide@^1.1.5, slide@~1.1.3, slide@~1.1.6:
   resolved "https://registry.npmjs.org/slide/-/slide-1.1.6.tgz"
   integrity sha1-VusCfWW00tzmyy4tMsTUr8nh1wc=
 
-slugify@^1.6.5:
-  version "1.6.5"
-  resolved "https://registry.yarnpkg.com/slugify/-/slugify-1.6.5.tgz#c8f5c072bf2135b80703589b39a3d41451fbe8c8"
-  integrity sha512-8mo9bslnBO3tr5PEVFzMPIWwWnipGS0xVbYf65zxDqfNwmzYn1LpiKNrR6DlClusuvo+hDHd1zKpmfAe83NQSQ==
+slugify@^1.6.6:
+  version "1.6.6"
+  resolved "https://registry.yarnpkg.com/slugify/-/slugify-1.6.6.tgz#2d4ac0eacb47add6af9e04d3be79319cbcc7924b"
+  integrity sha512-h+z7HKHYXj6wJU+AnS/+IH8Uh9fdcX1Lrhg1/VMdf9PwoBQXFcXiAdsy2tSK0P6gKwJLXp02r90ahUCqHk9rrw==
 
 smart-buffer@^1.0.13:
   version "1.1.15"