Merge pull request #505 from VincentLanglet/patch-1

Add static analysis files to .gitattributes

Author: greg0ire

.gitattributes

@@ -7,4 +7,7 @@
 .gitignore export-ignore
 phpcs.xml.dist export-ignore
 phpstan.neon export-ignore
+phpstan.neon.dist export-ignore
 phpunit.xml.dist export-ignore
+psalm.xml export-ignore
+psalm-baseline.xml export-ignore