The field is no longer used by pub and triggers a warning on publish.

Remove TODO comments waiting for things that will never change or that
we don't intend to take action on.

- https://github.com/dart-lang/sdk/issues/22977 is closed as not
  planned.
- Dart 2 does not support importing `dart:io` in cross platform code.
- Setting the exit code is not supported on web.
- We plan on keeping `executable.dart` under lib to allow reuse from
  other packages internally.
- We don't plan on trying to support `spawnHybridUri` outside of the
  test runner.
- `executable.main` is now declared to return a `Future`.
- We don't intend to take a dependency on `json_schema`.

Flutter pins package dependencies, including all transitive dependencies.

Because test_api depends on pedantic, Flutter pins that dependency.

However, pedantic is only depended on for the `unawaited` function, which is a one-line piece of code.

This will enable resolution of https://github.com/flutter/flutter/issues/48246 without requiring Flutter to unpin its dependencies, and with a very small overhead on test_api to not re-import pedantic :)  This helps downstream consumers who want to depend on the package for the actual analysis options files.

Also related: https://github.com/dart-lang/pedantic/issues/46

- always_declare_return_types
- annotate_overrides
- await_only_futures
- omit_local_variable_types
- prefer_collection_literals
- prefer_conditional_assignment
- prefer_final_fields
- prefer_for_elements_to_map_fromiterable
- prefer_if_null_operators
- prefer_spread_collections
- unnecessary_this
- use_function_type_syntax_for_parameters

Bump min SDK to 2.3.0 everywhere to allow using spreads in collection
literals.

Skip an already failing test

If a test times out at the default timeout, point to the docs for
changing timeouts in the error message.

* Extend synthetic test timeout

* better solo

Open to feedback on this. Here's how it works at the moment:

There's a new `--coverage` option that you can use to specify the output directory for your coverage. It will create a new output directory if one doesn't already exist.

The tests are run through the engine, and then get spit out to a coverage helper function. That coverage helper function:
**A)** Checks if it's a VM suite
**B)** Gathers coverage if it is
**C)** Outputs coverage to `${suite path}.vm.json`

So, for example, when I run:
```bash
pub run test --coverage hello_world test/vm/simple_repo_test.dart
```

A new file gets added at `hello_world/test/vm/simple_repo_test.dart.vm.json` with the coverage results!

A recent change to the Dart SDK updated `HttpClientResponse`
to implement `Stream<Uint8List>` rather than implementing
`Stream<List<int>>`.

This forwards-compatible chnage updates calls to
`Stream.transform(StreamTransformer)` to instead call the
functionally equivalent `StreamTransformer.bind(Stream)`
API, which puts the stream in a covariant position and
thus causes the SDK change to be non-breaking.

https://github.com/dart-lang/sdk/issues/36900

Closes https://github.com/dart-lang/test/issues/1032

Added `backend.dart` files to `test_core` and `test_api` that expose some new classes for use with the new `parseMetadata` function.

- Don't surround versions with quotes unless they have a space.
- Remove the unnecessary lower bound for packages where the current
  lower bound is not resolvable due to SDK constraints.
- Change single quotes to double quotes since they are preferred in
  yaml.
- Remove version constraints from `test_api` to `test` and `test_core`
  since we will always have path overrides to those packages.

Version `1.7.0` adds the import so it's the minimum version required.
Allow versions through `2.x` since the breaking change will be to change
the import which will now be satisfied.

* prep for release

Fixes https://github.com/dart-lang/test/issues/943

* Refactor test into two packages (#1)

* move test and test_core to packages folder

* rename test_core to test_api

* rename packages to pkgs, add dart.js back to repo

* change pubspec to point to test_api version

* move to correct dir in travis.yml

* Remove duplicate utils.dart