Travis: Test against lowest and dev dependencies

.travis.yml

@@ -276,6 +276,20 @@ jobs:
       before_script:
         - bash ./tests/travis/install-postgres-10.sh
 
+    - stage: Test
+      php: 7.1
+      env: DB=sqlite DEPENDENCIES=low
+      install:
+        - travis_retry composer update --prefer-dist --prefer-lowest
+
+    - stage: Test
+      if: type = cron
+      php: 7.2
+      env: DB=sqlite DEPENDENCIES=dev
+      install:
+        - composer config minimum-stability dev
+        - travis_retry composer update --prefer-dist
+
     - stage: Coverage
       php: 7.1
       env: DB=sqlite

composer.json

@@ -21,7 +21,7 @@
         "phpunit/phpunit": "^6.3",
         "phpunit/phpunit-mock-objects": "!=3.2.4,!=3.2.5",
         "squizlabs/php_codesniffer": "^3.0",
-        "symfony/console": "2.*||^3.0",
+        "symfony/console": "^2.0.5||^3.0",
         "symfony/phpunit-bridge": "^3.3"
     },
     "suggest": {