Minor fixes with Picker Item with how we treat the value prop

Author: ethanshar

src/components/picker/PickerItem.js

@@ -30,7 +30,7 @@ const PickerItem = props => {
   } = props;
   const context = useContext(PickerContext);
   const {migrate, renderItem} = context;
-  const isSelected = isItemSelected(value, !migrate && _.isObject(context.value) ? context.value.value : context.value);
+  const isSelected = isItemSelected(value, !migrate && _.isPlainObject(context.value) ? context.value.value : context.value);
   const itemLabel = getItemLabel(label, value, props.getItemLabel || context.getItemLabel);
   const accessibilityProps = {
     accessibilityState: isSelected ? {selected: true} : undefined,
@@ -54,7 +54,7 @@ const PickerItem = props => {
     if (migrate) {
       context.onPress(value);
     } else {
-      context.onPress(_.isObject(value) ? value : {value, label: itemLabel});
+      context.onPress((_.isPlainObject(value) || context.isMultiMode) ? value : {value, label: itemLabel});
     }
   }, [migrate, value, context.onPress]);
 

src/components/picker/index.js

@@ -213,6 +213,7 @@ class Picker extends PureComponent {
       migrate,
       value,
       onPress: mode === Picker.modes.MULTI ? this.toggleItemSelection : this.onDoneSelecting,
+      isMultiMode: mode === Picker.modes.MULTI,
       getItemValue,
       getItemLabel,
       onSelectedLayout: this.onSelectedItemLayout,