build(deps-dev): bump rollup from 2.4.0 to 2.6.1

Bumps [rollup](https://github.com/rollup/rollup) from 2.4.0 to 2.6.1.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollup/rollup/compare/v2.4.0...v2.6.1)

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

yarn.lock

@@ -5704,9 +5704,9 @@ rollup-pluginutils@^2.8.2:
     estree-walker "^0.6.1"
 
 rollup@^2.2.0:
-  version "2.4.0"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.4.0.tgz#b136a4d701d24dd79ec9551ee0330e7f632ee9d2"
-  integrity sha512-dYE2ZKl9+kxuFKDaaSuauZjIPa8hcKDqI7WrOq1pTXYG4GJw+6ypLifGIvCKw5yJpSmuFohuimYpg0wfRXTCLw==
+  version "2.6.1"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.6.1.tgz#8354e67caa7b8bf24c2488d9e2f64da2be62eebe"
+  integrity sha512-1RhFDRJeg027YjBO6+JxmVWkEZY0ASztHhoEUEWxOwkh4mjO58TFD6Uo7T7Y3FbmDpRTfKhM5NVxJyimCn0Elg==
   optionalDependencies:
     fsevents "~2.1.2"