Update to 8.0.0.beta1

[alvarezguille]

This change is 

[Artur-]

Reviewed 8 of 8 files at r1.
Review status: all files reviewed at latest revision, 1 unresolved discussion.

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testbench-integration-tests/src/main/java/com/vaadin/testUI/CheckBoxGroupSetValue.java, line 20 at r1 (raw file):

        options.add("item2");
        options.add("item3");
        group.setDataProvider(new ListDataProvider<>(options));

Could use group.setItems(options) here and in other places

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Comments from Reviewable

[rogozinds]

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Reviewed 6 of 8 files at r1, 2 of 2 files at r2.
Review status: all files reviewed at latest revision, all discussions resolved.

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testbench-integration-tests/src/main/java/com/vaadin/testUI/CheckBoxGroupSetValue.java, line 20 at r1 (raw file):

Previously, Artur- (Artur) wrote…

Could use group.setItems(options) here and in other places

Fixed

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Comments from Reviewable

[rogozinds]

Reviewed 1 of 8 files at r1.
Review status: all files reviewed at latest revision, all discussions resolved, some commit checks pending.

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Comments from Reviewable