fix: Release files are included in install

Author: D3strukt0r

.gitattributes

@@ -10,3 +10,4 @@
 CODEOWNERS export-ignore
 *.md export-ignore
 *.dist.php export-ignore
+*release*.json export-ignore

composer.json

@@ -50,7 +50,8 @@
             ".gitattributes",
             "CODEOWNERS",
             "*.md",
-            "*.dist.php"
+            "*.dist.php",
+            "*release*.json"
         ]
     }
 }