Update Vaadin to 14.1.21 (#1034)

Update Vaadin to 14.1.17 (#1018)

Update Vaadin to 14.1.16 (#1013)

Update Vaadin to 14.1.2 (#990)

Replace amount-field with vaadin-integer-field (#980)

Update Vaadin to 14.0.15 (#976)

Extend the attempts and wait when running ITs (#972) (#973)

Otherwise sometimes StartMojo fails because app hasn't start in wait * maxAttempts

Update Vaadin 14.0.13 (#968)

* Update Vaadin to 14.0.13

Do not forcePolyfill if customElements not defined (#967)