Bump to tokio 0.2.16. (pantsbuild#9467)

### Problem tokio has a new release that we're not on. ### Solution Hop on it. [ci skip-jvm-tests] # No JVM changes made.
foursquare · Apr 4, 2020 · eb43627 · eb43627
1 parent 24345c6
commit eb43627
Showing 1 changed file with 22 additions and 22 deletions.
diff --git a/src/rust/engine/Cargo.lock b/src/rust/engine/Cargo.lock