Try new .gitattributes approach

Author: vudaltsov

.gitattributes

@@ -1,15 +1,7 @@
-/.github/                         export-ignore
-/generator/                       export-ignore
-/stubs/                           export-ignore
-/tests/                           export-ignore
-/tools/                           export-ignore
-/.gitattributes                   export-ignore
-/.gitignore                       export-ignore
-/.php-cs-fixer.dist.php           export-ignore
-/composer-dependency-analyser.php export-ignore
-/composer.lock                    export-ignore
-/infection.json5.dist             export-ignore
-/phpstan.dist.neon                export-ignore
-/phpunit.xml.dist                 export-ignore
-/psalm.xml.dist                   export-ignore
-/rector.php                       export-ignore
+/* export-ignore
+/adr/* -export-ignore
+/src/* -export-ignore
+/CHANGELOG.md -export-ignore
+/composer.json -export-ignore
+/LICENSE -export-ignore
+/README.md -export-ignore