- 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.

As part of implementing the "UI as code" feature
(https://github.com/dart-lang/language/blob/master/accepted/future-releases/unified-collections/feature-specification.md)
the analyzer is deprecating the following classes and methods:

- ForStatement and ForEachStatement (ForStatement2 is now used for
  both kinds of loops)

- ListLiteral.elements (use elements2, which has a more general return
  type)

- AstVisitor.visitForEachStatement and AstVisitor.visitForStatement
  (visitForStatement2 is now used for both kinds of loops)

- AstVisitor.visitMapLiteral and AstVisitor.visitSetLiteral
  (visitSetOrMapLiteral is now used for both kinds of literals).

See deprecation CL: https://dart-review.googlesource.com/c/sdk/+/95665/

Gives an actionable error in a case where we'd otherwise get a stack
trace.

We have removed most of the special handling around
`IsolateSpawnException` so ti shouldn't matter if the exposed exception
implements that interface. On the web, for the `spawnHybridUri` or
`spawnHybridCode` case the web code shouldn't be able to see the type to
test for it anyway.

After splitting the package the file was copied to some of the package
but missing from the `test_core` package. Move it back up the directory
structure so it is picked up for all sub-packages.

Fix lints that were not caught in `test_core` while this was missing.

The linked SDK issue is resolved.

The SDK no longer outputs anything that looks like "Load Error". The
last commit which removed this pattern was
250773cb651beec1a61e126a6c0756aace9c19ca

I'm also unable to reproduce any case where the `toString()` includes
"Stack Trace:\n", and the file names don't look like they need to be
adjusted at all.

I will separetly look in to the migration, this is to get travis
unblocked for other commits.

This is a holdback from Dart 1 where some syntax or type errors were not
reported until runtime.

* prep for release

 Allow for multiple calls to executable.main()

- Fix some new implicit cast warnings.
- Adjust expectations for new source_span output.

In version `1.5.0` of `source_span` the output for multi-line spans was
updated to output the content and highlight a section with lines on the
left instead of the old `^^^^^` format. Update the expectations
accordingly to expect that a bit of the multi-line content is printed.

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

Fix DartDocs links

Also adjust the platform-specific-configuration links.

Fix broken links

* 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

- Remove APIs that are no longer used.
- Switch to `TypeMatcher` instead of manual implementation for exception
  matchers.
- Drop `isDart2` since we only run in Dart 2 mode everywhere.