cleanup non relevant old PhpStorm versions and add "2018.2.5" test env

Author: Haehnchen

.travis.yml

@@ -23,9 +23,8 @@ before_install:
 
 env:
   - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-183.2153.8" PHP_PLUGIN_VERSION="183.2153.44" TWIG_PLUGIN_VERSION="183.2153.44" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3"
+  - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-2018.2.5" PHP_PLUGIN_VERSION="182.4892.16" TWIG_PLUGIN_VERSION="182.3458.35" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3"
   - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-2018.2" PHP_PLUGIN_VERSION="182.3684.42" TWIG_PLUGIN_VERSION="182.3458.35" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3"
-  - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-2018.1" PHP_PLUGIN_VERSION="181.4203.565" TWIG_PLUGIN_VERSION="181.3741.23" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3"
-  - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-2017.3.5" PHP_PLUGIN_VERSION="173.4301.34" TWIG_PLUGIN_VERSION="173.4301.7" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.2.1"
 
 script:
 - "./gradlew check verifyPlugin buildPlugin"