minor #140 Update .gitattributes (Nyholm)

This PR was merged into the main branch.

Discussion
----------

Update .gitattributes

I'll keep making some chore PRs.

Commits
-------

b1a4c55 Update .gitattributes

Author: weaverryan

.gitattributes

@@ -1,6 +1,10 @@
+/.github
 /tests export-ignore
 /phpunit.xml.dist export-ignore
 /.gitattributes export-ignore
 /.gitignore export-ignore
 /.php-cs-fixer.dist.php export-ignore
-/.travis.yml export-ignore
+/phpstan.neon.dist
+/phpstan-baseline.neon
+/psalm.baseline.xml
+/psalm.xml