Try making lowest dep tests faster

Author: wouterj

.travis.yml

@@ -21,9 +21,7 @@ matrix:
     - php: 7.1
       env: DEPS=dev SYMFONY_VERSION=3.3.*
     - php: 5.5
-      env: COMPOSER_FLAGS="--prefer-lowest" SYMFONY_DEPRECATIONS_HELPER=weak
-    - php: 7.1
-      env: SYMFONY_VERSION=2.8.*
+      env: SYMFONY_VERSION=2.8.* COMPOSER_FLAGS="--prefer-lowest" SYMFONY_DEPRECATIONS_HELPER=weak
     - php: 7.1
       env: SYMFONY_VERSION=3.1.*
   fast_finish: true