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[karma-esm] Missing 'dedupe' option

3

`setup-es-dev-server.js` sets **dedupe** property, but `es-dev-server` needs **dedupeModules**. https://github.com/open-wc/open-wc/blob/80a3f1a1542de1826c01f8978cf84323428b653d/packages/karma-esm/src/setup-es-dev-server.js#L126 https://github.com/open-wc/open-wc/blob/80a3f1a1542de1826c01f8978cf84323428b653d/packages/es-dev-server/src/config.js#L143

IllegalArgumentException occur when a row is dropped on a filter of a header row

4

### Description Instantination of `GridDropEvent` fails due to incomplete event data when a row is dropped on a filter. ``` java.lang.IllegalArgumentException: Unable to create an event object of type com.vaadin.flow.component.grid.dnd.GridDropEvent...