Add bollard-stubs

Author: jimmiebfulton

Cargo.toml

@@ -11,6 +11,7 @@ authors = [
 [dependencies]
 async-trait = "0.1.52"
 bollard = "0.11.1"
+bollard-stubs = "1.41.1"
 futures = "0.3"
 thiserror = "1.0"
 tokio = {version = "1.17.0", features = ["rt","macros"]}