Bump bootswatch from 4.3.1 to 4.4.0

Bumps [bootswatch](https://github.com/thomaspark/bootswatch) from 4.3.1 to 4.4.0.
- [Release notes](https://github.com/thomaspark/bootswatch/releases)
- [Commits](thomaspark/bootswatch@v4.3.1...v4.4.0)

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

package.json

@@ -57,7 +57,7 @@
   "devDependencies": {
     "bootlint": "1.0.0",
     "bootstrap": "4.4.0",
-    "bootswatch": "4.3.1",
+    "bootswatch": "4.4.0",
     "escape-string-regexp": "^2.0.0",
     "eslint": "^6.7.1",
     "fs-extra": "^8.1.0",