composer(deps-dev): Bump ergebnis/license from 1.0.0 to 2.6.0

Bumps [ergebnis/license](https://github.com/ergebnis/license) from 1.0.0 to 2.6.0.
- [Release notes](https://github.com/ergebnis/license/releases)
- [Changelog](https://github.com/ergebnis/license/blob/main/CHANGELOG.md)
- [Commits](ergebnis/license@1.0.0...2.6.0)

---
updated-dependencies:
- dependency-name: ergebnis/license
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

composer.json

@@ -19,7 +19,7 @@
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.1.1",
-    "ergebnis/license": "^1.0.0",
+    "ergebnis/license": "^2.6.0",
     "ergebnis/php-cs-fixer-config": "~2.2.0",
     "phpspec/prophecy": "^1.7.0",
     "phpunit/phpunit": "^6.0.0 || ^7.0.0 || ^8.0.0 || ^9.0.0"