0.30 Release for IntelliJ 2018.1- 2019.1

Fixed #570: Better support for @Builder.Default (var$set and var$value fields)
Fixed #754: Intention to convert explicit type to var/val or vice versa, thanks to @Sheigutn (Florian Böhm)
Fixed #760: Plugin and compiler disagree on @builder method generation
Fixed #771: @DaTa No error message when there is no default constructor in superclass
Fixed #805: Do not use deprecated constructor injection
Fixed #807: Do not use ImplicitUsageProvider in GenerateConstructorAction
Fixed #822: @builder annotation on multiple methods of same class is broken
Fixed #825: intellij objects to overriding builder methods when setterPrefix set