chore(deps-dev): bump rollup from 3.18.0 to 3.26.2

Bumps [rollup](https://github.com/rollup/rollup) from 3.18.0 to 3.26.2.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v3.18.0...v3.26.2)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

package.json

@@ -52,7 +52,7 @@
     "gulp-terser": "^2.1.0",
     "gulp-ttf2woff2": "^4.0.1",
     "gulp-wp-pot": "^2.5.0",
-    "rollup": "^3.18.0",
+    "rollup": "^3.26.2",
     "sass": "^1.58.3",
     "stylelint": "^15.2.0",
     "stylelint-config-recess-order": "^4.0.0",

yarn.lock

@@ -7004,10 +7004,10 @@ rimraf@^3.0.2:
   dependencies:
     glob "^7.1.3"
 
-rollup@^3.18.0:
-  version "3.18.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-3.18.0.tgz#2354ba63ba66d6a09c652c3ea0dbcd9dad72bbde"
-  integrity sha512-J8C6VfEBjkvYPESMQYxKHxNOh4A5a3FlP+0BETGo34HEcE4eTlgCrO2+eWzlu2a/sHs2QUkZco+wscH7jhhgWg==
+rollup@^3.26.2:
+  version "3.26.2"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-3.26.2.tgz#2e76a37606cb523fc9fef43e6f59c93f86d95e7c"
+  integrity sha512-6umBIGVz93er97pMgQO08LuH3m6PUb3jlDUUGFsNJB6VgTCUaDFpupf5JfU30529m/UKOgmiX+uY6Sx8cOYpLA==
   optionalDependencies:
     fsevents "~2.3.2"