Update dekodeinteraktiv/coding-standards requirement (#20)

Updates the requirements on [dekodeinteraktiv/coding-standards](https://github.com/DekodeInteraktiv/coding-standards) to permit the latest version.
- [Release notes](https://github.com/DekodeInteraktiv/coding-standards/releases)
- [Changelog](https://github.com/DekodeInteraktiv/coding-standards/blob/master/CHANGELOG.md)
- [Commits](https://github.com/DekodeInteraktiv/coding-standards/commits/1.2.0)

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

Author: dependabot[bot]

composer.json

@@ -24,7 +24,7 @@
     ]
   },
   "require-dev": {
-    "dekodeinteraktiv/coding-standards": "^0.3.1"
+    "dekodeinteraktiv/coding-standards": "^1.2.0"
   },
   "scripts": {
     "test": [