Updated .gitattributes of flow-php/etl

Author: norberttech

src/core/etl/.gitattributes

@@ -6,9 +6,5 @@
 /var export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
-/.php_cs export-ignore
-/composer.lock export-ignore
-/phpstan.neon export-ignore
-/phpunit.xml export-ignore
-/psalm.xml export-ignore
-/infection.json export-ignore
+/CONTRIBUTING.md export-ignore
+/README.md export-ignore

src/core/etl/composer.json

@@ -43,5 +43,6 @@
             "Flow\\": "tests/Flow"
         }
     },
+    "minimum-stability": "dev",
     "prefer-stable": true
 }