* Adapt for strong-mode changes to zone.

* Use `runGuarded` instead of `runUnaryGuarded`.

* Increment version number.

* Add Changelog entry.

* Drain and ignore

* add changelog and pubspec

Fixes #667

Fixes #674

dynamic is treated as the bottom type for function arguments, but this
will soon change. Null will continue to be the bottom type.

The question we are asking is "Is this a function that takes one
argument", when dynamic is no longer the bottom type the question will
become "Is this a function that takes one dynamic argument", and a
function which take one argument of a specific type does *not* take a
dynamic argument.

* extend timeout

Bump to 0.12.24+1.

This also makes CompilerPool more general, so it can be used by both
the node and the browser platforms.

This is redundant with StreamQueue.startTransaction().

Run tear-downs in the same error zone as tests.

We used to create a new error zone for each call to
waitForOutstandingCallbacks(), which meant that asynchronous errors
couldn't be safely passed around within a single test. Now we have a
single error handler that manually checks the zone in which the error
was thrown.

Enable associated lint
Verified the new lower bound (v0.26.4 from Dec 7, 2015) works

Stop using scheduled_test.