Upgrade rust/crates/tokio-test to 0.4.2

Test: make
Change-Id: I169343506a12b86ff0484b2a7e197389c2a3e30c
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index 2691c89..55d5aaf 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -6,13 +6,13 @@
 #   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "tokio-test-0.4.x" git tag.
-version = "0.4.1"
+version = "0.4.2"
 edition = "2018"
 authors = ["Tokio Contributors <team@tokio.rs>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-test/0.4.1/tokio_test"
+documentation = "https://docs.rs/tokio-test/0.4.2/tokio_test"
 description = """
 Testing utilities for Tokio- and futures-based code
 """