remove dev deps from test_core, change test_core dev dep for package:test (#980)

diff --git a/pkgs/test/pubspec.yaml b/pkgs/test/pubspec.yaml
index f19bc41..542d4e2 100644
--- a/pkgs/test/pubspec.yaml
+++ b/pkgs/test/pubspec.yaml
@@ -34,7 +34,7 @@
   yaml: '^2.0.0'
   # Use an exact version until the test_api and test_core package are stable.
   test_api: '0.2.2'
-  test_core: '0.2.1'
+  test_core: '0.2.1+1'
 
 dev_dependencies:
   fake_async: '>=0.1.2 <2.0.0'
diff --git a/pkgs/test_core/pubspec.yaml b/pkgs/test_core/pubspec.yaml
index 9eea3be..e4750c1 100644
--- a/pkgs/test_core/pubspec.yaml
+++ b/pkgs/test_core/pubspec.yaml
@@ -33,13 +33,6 @@
   # Use an exact version until the test_api package is stable.
   test_api: '0.2.2'
 
-dev_dependencies:
-  fake_async: '>=0.1.2 <2.0.0'
-  pedantic: '^1.4.0'
-  shelf_test_handler: '^1.0.0'
-  test_descriptor: '^1.0.0'
-  test_process: '^1.0.0'
-
 dependency_overrides:
   test_api:
     path: ./../test_api