add missing dev_dependency on pkg:path

pkgs/pubspec_parse/pubspec.yaml

diff --git a/pkgs/pubspec_parse/pubspec.yaml b/pkgs/pubspec_parse/pubspec.yaml
index 526c751..4579c9b 100644
--- a/pkgs/pubspec_parse/pubspec.yaml
+++ b/pkgs/pubspec_parse/pubspec.yaml
@@ -17,5 +17,6 @@
 dev_dependencies:
   build_runner: ^0.8.0
   json_serializable: ^0.5.6
+  path: ^1.5.1
   stack_trace: ^1.9.2
   test: ^0.12.0