fix: exclude irrelevant files from composer package

Author: spawnia

.gitattributes

@@ -1,9 +1,17 @@
-/.dependabot/ export-ignore
-/.github/ export-ignore
-/test/ export-ignore
+/.dependabot export-ignore
+/.github export-ignore
+/test export-ignore
+/.codecov.yml export-ignore
 /.editorconfig export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
+/.php-cs-fixer.php export-ignore
+/.releaserc.json export-ignore
+/CHANGELOG.md export-ignore
+/CONTRIBUTING.md export-ignore
 /Makefile export-ignore
+/package.json export-ignore
+/package-lock.json export-ignore
 /phpstan.neon export-ignore
 /phpunit.xml export-ignore
+/rector.php export-ignore