[TASK] Introduce testing and linting for code snippets

Releases: main, 13.4, 12.4

Author: linawolf

composer.json

@@ -4,7 +4,7 @@
 	"description": "ViewHelper Reference",
 	"license": "OPL-1.0",
 	"require": {
-		"typo3/cms-core": "dev-main as 13.4"
+		"typo3/cms-core": "^13.4"
 	},
 	"require-dev": {
 		"ergebnis/composer-normalize": "~2.44.0",
@@ -15,39 +15,39 @@
 		"t3docs/codesnippet": "dev-main",
 		"t3docs/examples": "dev-main",
 		"t3docs/site-package": "dev-main",
-		"typo3/cms-adminpanel": "dev-main as 13.4",
-		"typo3/cms-backend": "dev-main as 13.4",
-		"typo3/cms-belog": "dev-main as 13.4",
-		"typo3/cms-beuser": "dev-main as 13.4",
-		"typo3/cms-dashboard": "dev-main as 13.4",
-		"typo3/cms-extbase": "dev-main as 13.4",
-		"typo3/cms-extensionmanager": "dev-main as 13.4",
-		"typo3/cms-felogin": "dev-main as 13.4",
-		"typo3/cms-filelist": "dev-main as 13.4",
-		"typo3/cms-filemetadata": "dev-main as 13.4",
-		"typo3/cms-fluid": "dev-main as 13.4",
-		"typo3/cms-fluid-styled-content": "dev-main as 13.4",
-		"typo3/cms-form": "dev-main as 13.4",
-		"typo3/cms-frontend": "dev-main as 13.4",
-		"typo3/cms-impexp": "dev-main as 13.4",
-		"typo3/cms-indexed-search": "dev-main as 13.4",
-		"typo3/cms-info": "dev-main as 13.4",
-		"typo3/cms-install": "dev-main as 13.4",
-		"typo3/cms-linkvalidator": "dev-main as 13.4",
-		"typo3/cms-lowlevel": "dev-main as 13.4",
-		"typo3/cms-opendocs": "dev-main as 13.4",
-		"typo3/cms-recycler": "dev-main as 13.4",
-		"typo3/cms-redirects": "dev-main as 13.4",
-		"typo3/cms-reports": "dev-main as 13.4",
-		"typo3/cms-rte-ckeditor": "dev-main as 13.4",
-		"typo3/cms-scheduler": "dev-main as 13.4",
-		"typo3/cms-seo": "dev-main as 13.4",
-		"typo3/cms-setup": "dev-main as 13.4",
-		"typo3/cms-styleguide": "dev-main as 13.4",
-		"typo3/cms-sys-note": "dev-main as 13.4",
-		"typo3/cms-tstemplate": "dev-main as 13.4",
-		"typo3/cms-viewpage": "dev-main as 13.4",
-		"typo3/cms-workspaces": "dev-main as 13.4",
+		"typo3/cms-adminpanel": "^13.4",
+		"typo3/cms-backend": "^13.4",
+		"typo3/cms-belog": "^13.4",
+		"typo3/cms-beuser": "^13.4",
+		"typo3/cms-dashboard": "^13.4",
+		"typo3/cms-extbase": "^13.4",
+		"typo3/cms-extensionmanager": "^13.4",
+		"typo3/cms-felogin": "^13.4",
+		"typo3/cms-filelist": "^13.4",
+		"typo3/cms-filemetadata": "^13.4",
+		"typo3/cms-fluid": "^13.4",
+		"typo3/cms-fluid-styled-content": "^13.4",
+		"typo3/cms-form": "^13.4",
+		"typo3/cms-frontend": "^13.4",
+		"typo3/cms-impexp": "^13.4",
+		"typo3/cms-indexed-search": "^13.4",
+		"typo3/cms-info": "^13.4",
+		"typo3/cms-install": "^13.4",
+		"typo3/cms-linkvalidator": "^13.4",
+		"typo3/cms-lowlevel": "^13.4",
+		"typo3/cms-opendocs": "^13.4",
+		"typo3/cms-recycler": "^13.4",
+		"typo3/cms-redirects": "^13.4",
+		"typo3/cms-reports": "^13.4",
+		"typo3/cms-rte-ckeditor": "^13.4",
+		"typo3/cms-scheduler": "^13.4",
+		"typo3/cms-seo": "^13.4",
+		"typo3/cms-setup": "^13.4",
+		"typo3/cms-styleguide": "^13.4",
+		"typo3/cms-sys-note": "^13.4",
+		"typo3/cms-tstemplate": "^13.4",
+		"typo3/cms-viewpage": "^13.4",
+		"typo3/cms-workspaces": "^13.4",
 		"typo3/testing-framework": "^8.2"
 	},
 	"minimum-stability": "dev",