fix🔨: permission_handler package updated permission fetch & request syntax

[yashwp]

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In the latest version of permission_handler package, they have changed the syntax of how to request for the user's permission.

[yashwp]

@lukasgit Please check this PR and merge, as rhe example is misleading while integration.

[imaNNeo]

Hi there. I am pleased to review your code. As I see you forgot to update the permission_handler version in the pubspec.yaml file.