travix indentation

.travis.yml

@@ -2,9 +2,9 @@
 language: php
 ## Friendica supports PHP version >= 5.6
 php:
-	- 5.6
-	- 7.0
-	- 7.1
-	- 7.2
+ - 5.6
+ - 7.0
+ - 7.1
+ - 7.2
 
 install: composer install