update gitignore and gitattributes

Author: tillkruss

.gitattributes

@@ -1,2 +1,14 @@
 includes/admin-page.php linguist-language=HTML+PHP
 includes/servers-list.php linguist-language=HTML+PHP
+
+/.github export-ignore
+/assets export-ignore
+/tests export-ignore
+.editorconfig export-ignore
+.gitattributes export-ignore
+.gitignore export-ignore
+.php_cs export-ignore
+.travis.yml export-ignore
+composer.json export-ignore
+phpunit.xml export-ignore
+readme.txt export-ignore

.gitignore

@@ -1,3 +1,2 @@
-/.vscode
 /vendor
-composer.lock
+composer.lock