test_api, test_core: update readmes (#1590)

Drop silly title
Link to pkg:test, which is likely what most folks want
diff --git a/pkgs/test_api/CHANGELOG.md b/pkgs/test_api/CHANGELOG.md
index c060172..edeae81 100644
--- a/pkgs/test_api/CHANGELOG.md
+++ b/pkgs/test_api/CHANGELOG.md
@@ -1,3 +1,5 @@
+## 0.4.5-dev
+
 ## 0.4.4
 
 * Allow disabling duplicate test or group names in the `Declarer`.
diff --git a/pkgs/test_api/README.md b/pkgs/test_api/README.md
index 3652f02..27c759b 100644
--- a/pkgs/test_api/README.md
+++ b/pkgs/test_api/README.md
@@ -1,4 +1,5 @@
-## test_api 
+A minimal package for writing tests. At this time this package is not intended
+to be publicly used as the API will take time to stabilize.
 
-This is a a minimal package for writing tests. At this time this package is not
-intended to be publicly used as the API will take time to stabilize.
+If you're interested in testing Dart code, you likely want to use
+[package:test](https://pub.dev/packages/test).
diff --git a/pkgs/test_api/pubspec.yaml b/pkgs/test_api/pubspec.yaml
index 698f443..669b398 100644
--- a/pkgs/test_api/pubspec.yaml
+++ b/pkgs/test_api/pubspec.yaml
@@ -1,5 +1,5 @@
 name: test_api
-version: 0.4.4
+version: 0.4.5-dev
 description: A library for writing Dart tests.
 homepage: https://github.com/dart-lang/test/blob/master/pkgs/test_api
 
diff --git a/pkgs/test_core/README.md b/pkgs/test_core/README.md
index 7ca9b04..46d64fd 100644
--- a/pkgs/test_core/README.md
+++ b/pkgs/test_core/README.md
@@ -1,5 +1,8 @@
 A minimal package for writing and running tests as well as extensions for
 implementing a custom test runner.
 
+If you're interested in testing Dart code, you likely want to use
+[package:test](https://pub.dev/packages/test).
+
 At this time this package is not intended to be used publicly. The API is not
 yet stable.