Bump del from 4.1.1 to 5.1.0

Bumps [del](https://github.com/sindresorhus/del) from 4.1.1 to 5.1.0.
- [Release notes](https://github.com/sindresorhus/del/releases)
- [Commits](https://github.com/sindresorhus/del/compare/v4.1.1...v5.1.0)

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

package.json

@@ -17,7 +17,7 @@
     "browser-sync": "^2.26.7",
     "child_process": "^1.0.2",
     "core-js": "^3.6.5",
-    "del": "^4.1.1",
+    "del": "^5.1.0",
     "fancy-log": "^1.3.3",
     "fstream": "^1.0.12",
     "gulp": "^4.0.2",