New Features
- ComboBox version updated to 3.0.1
- vaadin-upload is added to webjars bom #2804
- ComponentRenderer for Grid added #2720
- Added API for freezing columns in the Grid #2784
- Added API for rendering item details for Grid rows #2772
- Flow servlet and other Spring Servlets work better together now #2660
- Flow Spring tutorial app is added: https://github.com/vaadin/flow-spring-tutorial