update test dep; bump version (#102)

diff --git a/packages/file/pubspec.yaml b/packages/file/pubspec.yaml
index cf7146d..663ec19 100644
--- a/packages/file/pubspec.yaml
+++ b/packages/file/pubspec.yaml
@@ -1,5 +1,5 @@
 name: file
-version: 5.0.2
+version: 5.0.3
 authors:
 - Matan Lurey <matanl@google.com>
 - Yegor Jbanov <yjbanov@google.com>
@@ -13,7 +13,7 @@
   path: ^1.5.1
 
 dev_dependencies:
-  test: ^0.12.33
+  test: ^1.0.0
   file_testing: '>=2.0.0 <3.0.0'
 
 environment: