Fix call to php-coveralls

fpoirotte · fpoirotte · commit bf2a2e18d2f6 · 2018-05-11T19:50:15.000+02:00
diff --git a/.travis.yml b/.travis.yml
@@ -42,4 +42,4 @@ script:
 
 after_success:
     - composer require --dev satooshi/php-coveralls
-    - travis_retry vendor/bin/coveralls -n -v
+    - travis_retry vendor/bin/php-coveralls -n -v
