Undefined symbols for architecture arm64

[Andrious]

@sroddy
Hey. Great plugin.

Hoping you could take a look at the console message I'm getting when attempting to run my library package on iOS. Been in Flutter for some time now, but I'm coming from the Android world and only now looking into running Flutter in iOS.

I have no experience with Xcode. I found the closed issue may pertain to my issue, but I don't have any idea how to proceed.