2020.3 support: update versions in .travis.yml

Author: slapoguzov

.travis.yml

@@ -23,7 +23,7 @@ before_install:
 - "export ORG_GRADLE_PROJECT_annotationPluginVersion=${ANNOTATION_PLUGIN_VERSION}"
 
 env:
-  - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-2020.2" PHP_PLUGIN_VERSION="202.6397.115" TWIG_PLUGIN_VERSION="202.6397.21" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3" DQL_PLUGIN_VERSION="202.6397.59"
+  - PHPSTORM_ENV="skip incomplete" IDEA_VERSION="IU-203.5981.41-EAP-SNAPSHOT" PHP_PLUGIN_VERSION="203.5981.114" TWIG_PLUGIN_VERSION="203.5981.120" TOOLBOX_PLUGIN_VERSION="0.4.6" ANNOTATION_PLUGIN_VERSION="5.3" DQL_PLUGIN_VERSION="203.5981.114"
 
 script:
 - "./gradlew check verifyPlugin buildPlugin"