fix(useTextareaAutosize): autosize error when changing input asynchronously

[jsonleex]

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As the VueUse audience continues to grow, we have been inundated with an overwhelming number of feature requests and pull requests. As a result, maintaining the project has become increasingly challenging and has stretched our capacity to its limits. As such, in the near future, we may need to slow down our acceptance of new features and prioritize the stability and quality of existing functions. Please note that new features for VueUse may not be accepted at this time. If you have any new ideas, we suggest that you first incorporate them into your own codebase, iterate on them to suit your needs, and assess their generalizability. If you strongly believe that your ideas are beneficial to the community, you may submit a pull request along with your use cases, and we would be happy to review and discuss them. Thank you for your understanding.

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Description

fixes: #3110

Additional context

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🤖 Generated by Copilot at 7007fce

Fix textarea resizing bug with nextTick in useTextareaAutosize function. Use vue-demi to ensure compatibility with both Vue 2 and 3.

🤖 Generated by Copilot at 7007fce

• Import nextTick function from vue-demi to defer callbacks until next DOM update cycle (link)
• Wrap triggerResize function in nextTick call inside watch effect to fix textarea resizing bug when value is changed programmatically (link)