Fix travis typo

Author: alinalexandru

.travis.yml

@@ -19,7 +19,7 @@ matrix:
     include:
         - php: 5.3
           env: COMPOSER_FLAGS="--prefer-lowest" SYMFONY_DEPRECATIONS_HELPER=weak
-        # Test against Symfpny LTS versions
+        # Test against Symfony LTS versions
         - php: 5.6
           env: SYMFONY_VERSION=2.3.*
         - php: 5.6