Flutter WebView v4 Support

[kattaliraees]

• updated webview_flutter: ^4.4.1
• updated url_launcher 6.1.14
• iOS Project Settings Update
• Android Project Settings Update

#22
#21

[kattaliraees]

@senthilnasa could you please check this PR ?

[senthilnasa]

Dear @kattaliraees,

I hope this message finds you well. I want to apologize for the delay in responding to your pull request for the "high_chart" Flutter plugin. Your contribution is highly valued, and I appreciate the effort and time you've dedicated to this project.

I am currently reviewing your code submission. My goal is to ensure that it aligns with the overall objectives and quality standards of the "high_chart" plugin. I thank you for your patience and understanding as I go through this process.

I will make it a priority to provide you with detailed feedback or to reach out with any further questions as soon as possible. Your contribution is significant, and I am committed to giving it the attention and consideration it deserves.

Thank you once again for your patience and for contributing to the "high_chart" Flutter plugin. Should you have any questions or require additional information in the meantime, please do not hesitate to get in touch.

Best regards,
Senthil Prabhu K