getColor is deprecated

[Rushi98]

Introduced by @mohanish3 via #26 in aboutmac/AboutMacActivity.

See https://developer.android.com/reference/android/content/res/Resources#getColor(int) for reference

[mohanish3]

It's deprecated for API level 23 and above, but our min API level is 21 which does not have the new method.

[Rushi98]

can be but in if (BuildConfig.Version) block

[Rushi98]

using the newer api will enable us to support theming