Configure directories and files that should not be added to archives

Author: sebastianbergmann

.gitattributes

@@ -0,0 +1,14 @@
+/build export-ignore
+/tests export-ignore
+/tools export-ignore
+/.github export-ignore
+/.gitattributes export-ignore
+/.gitignore export-ignore
+/.php_cs.dist export-ignore
+/build.xml export-ignore
+/infection.json5 export-ignore
+/phive.xml export-ignore
+/.php-cs-fixer.dist.php export-ignore
+/phpstorm.xml export-ignore
+/phpunit.xml export-ignore
+/psalm.xml export-ignore