servo: Merge #15753 - Fix Cargo.toml in servo_tidy_tests (from UK992:tidy); r=jdm

- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #15737

Source-Repo: https://github.com/servo/servo
Source-Revision: 28bd00debc4f64ff4a9973bea0003c3fd6776299

--HG--
extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear
extra : subtree_revision : c3ba9a60a9c479fbc38985ad84a014f910c5822c

servo/python/tidy/servo_tidy_tests/Cargo.toml

@@ -1,5 +1,8 @@
 [package]
 name = "test"
-version = "*"
+version = "0.0.1"
 authors = ["The Servo Project Developers"]
 publish = false
+
+[dependencies]
+test-package = { version = "*" }