Updating composer dependencies

composer.json

@@ -14,10 +14,10 @@
         "php": ">=5.6",
         "codeception/codeception": "^3",
         "phpunit/phpunit": "^5.7.27",
-        "joomla-projects/joomla-browser": "v3.9.0",
+        "joomla-projects/joomla-browser": "^3.9",
         "consolidation/robo": "^1.0.0",
         "joomla-projects/joomla-testing-robo": "~1.0",
-        "joomla-projects/selenium-server-standalone": "v3.14.0",
+        "joomla-projects/selenium-server-standalone": "^3.14",
         "fzaninotto/faker": "^1.6",
         "joomla-projects/jorobo": "~0.7",
         "behat/gherkin": "^4.4.1"