Update package:js version constraints to ^0.7.0 and update test versions to match (flutter/engine#54629)

This removes the dependency on `dart:js` and allows that library to be removed from dart2wasm. Also updates `test` dependencies to work with the new `package:js` constraints.

engine/src/flutter/lib/web_ui/pubspec.yaml

@@ -6,7 +6,7 @@ environment:
   sdk: '>=3.6.0-0 <4.0.0'
 
 dependencies:
-  js: 0.6.4
+  js: ^0.7.0
   meta: ^1.7.0
   web_locale_keymap:
     path: ../../third_party/web_locale_keymap
@@ -37,7 +37,7 @@ dev_dependencies:
   shelf_web_socket: any
   stack_trace: any
   stream_channel: 2.1.1
-  test: 1.24.8
+  test: 1.25.8
   test_api: any
   test_core: any
   typed_data: any

engine/src/flutter/web_sdk/web_engine_tester/pubspec.yaml

@@ -5,9 +5,9 @@ environment:
   sdk: '>=3.2.0-0 <4.0.0'
 
 dependencies:
-  js: 0.6.4
+  js: ^0.7.0
   stream_channel: 2.1.1
-  test: 1.24.8
+  test: 1.25.8
   webkit_inspection_protocol: 1.0.0
   stack_trace: 1.10.0
   ui:

engine/src/flutter/web_sdk/web_test_utils/pubspec.yaml

@@ -8,7 +8,7 @@ dependencies:
   collection: 1.17.0
   crypto: 3.0.3
   image: 3.0.1
-  js: 0.6.4
+  js: ^0.7.0
   meta: ^1.7.0
   path: 1.8.0
   process: 4.2.3