Accent Color causing errors for newer Flutter updates

[dallinwelch]

Describe the bug New error with new Flutter 3.16 where I get this issue flutter_fortune_wheel-1.2.0/lib/src/indicators/triangle_indicator.dar t:20:33: Error: The getter 'accentColor' isn't defined for the class 'ThemeData'. It happens as well in rectangle_indicator.da rt:17:63: Error: The getter 'accentColor' isn't defined for the class 'ThemeData'.These can be easily fixed if we replace with a real color.

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Desktop (please complete the following information):

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• Browser [e.g. chrome, safari]
• Version [e.g. 22]

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• OS: [e.g. iOS8.1]
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• Version [e.g. 22]

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