pub upgrade stack_trace

[Natalie Weizenbaum]

Hey folks,

Dart 1.22 comes with support for causal asynchronous stack traces in the VM. If you're familiar with the stack_trace package's notion of stack chains, these are pretty much the same idea but built into the VM. If you're running Dart in checked mode, you'll see them automatically. Rad!

Because they produce a new stack format, older versions of the stack_trace package can't handle them. But I've already released a fix! You can get by running pub upgrade stack_trace.

tl;dr: If you're seeing weird stack trace issues, run pub upgrade stack_trace.

- Natalie