update image_picker to 1.2.2

[getong]

Because tdesign_flutter >=0.2.2 depends on image_picker 1.1.2 and
  widget depends on image_picker ^1.2.2, tdesign_flutter >=0.2.2 is
  forbidden.
So, because widget_layout_example2 depends on tdesign_flutter ^0.2.7, version solving
  failed.

[github-actions]

👋 @getong，感谢给 TDesign 提出了 issue。
请根据 issue 模版确保背景信息的完善，我们将调查并尽快回复你。

[runoob-coder]

tdesign-flutter的image_picker版本固定死的

你可以试下版本覆盖的方式

dependency_overrides:
  image_picker: ^1.2.2