update version

Author: bcpeinhardt

gradle.properties

@@ -4,7 +4,7 @@ pluginGroup=com.coder.gateway
 # Zip file name.
 pluginName=coder-gateway
 # SemVer format -> https://semver.org
-pluginVersion=2.19.0
+pluginVersion=2.20.0
 # See https://plugins.jetbrains.com/docs/intellij/build-number-ranges.html
 # for insight into build numbers and IntelliJ Platform versions.
 pluginSinceBuild=233.6745