chore(deps-dev): bump del from 4.1.1 to 5.0.0

Bumps [del](https://github.com/sindresorhus/del) from 4.1.1 to 5.0.0.
- [Release notes](https://github.com/sindresorhus/del/releases)
- [Commits](sindresorhus/del@v4.1.1...v5.0.0)

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

Author: dependabot-preview[bot]

package-lock.json

@@ -32,7 +32,7 @@
     "acorn": "^6.2.0",
     "chai": "^4.2.0",
     "cypress": "^3.4.0",
-    "del": "^4.1.1",
+    "del": "^5.0.0",
     "gulp": "^4.0.2",
     "gulp-autoprefixer": "^6.1.0",
     "gulp-concat": "^2.6.1",