Fix Flow errors

frontend/src/metabase-lib/lib/Question.integ.spec.js

frontend/src/metabase-lib/lib/Question.js

frontend/src/metabase-lib/lib/metadata/Table.js

frontend/src/metabase-lib/lib/queries/NativeQuery.js

frontend/src/metabase-lib/lib/queries/StructuredQuery.js

frontend/src/metabase/lib/api.js

frontend/src/metabase/lib/permissions.js

frontend/src/metabase/meta/Card.js

frontend/src/metabase/meta/types/Card.js

frontend/src/metabase/meta/types/Database.js

frontend/src/metabase/meta/types/Table.js

...end/src/metabase/qb/components/TimeseriesFilterWidget.jsx

...d/src/metabase/qb/components/TimeseriesGroupingWidget.jsx

...e/qb/components/actions/CommonMetricsAction.integ.spec.js

...ase/qb/components/actions/CountByTimeAction.integ.spec.js

...tend/src/metabase/qb/components/actions/PivotByAction.jsx

.../qb/components/actions/SummarizeBySegmentMetricAction.jsx

...nents/actions/SummarizeBySegmentMetricAction.unit.spec.js

...base/qb/components/drill/CountByColumnDrill.integ.spec.js

...tabase/qb/components/drill/QuickFilterDrill.integ.spec.js