Gradle version should be >= 4.3

[carymrobbins]

Using the Gradle project wizard with the default bundled gradle wrapper doesn't work for IntelliJ 2017.3 because it uses Gradle 4.0, whereas gradle-eta requires at least Gradle 4.3. This doesn't seem to be configurable as it's hard coded to the bundled version -

https://github.com/JetBrains/intellij-community/blob/4919a951dfe0916f86983741b6c3edf30aacce54/plugins/gradle/java/src/service/project/wizard/GradleModuleBuilder.java#L336

This can be worked around by using a newer version of IntelliJ. For example, when using IntelliJ 2018.1.5, the Gradle version defaults to 4.4, resolving the issue.