RUST-1006 Bump bson dependency to 2.0.0

Author: patrickfreed

Cargo.toml

@@ -39,7 +39,7 @@ aws-auth = ["reqwest"]
 async-trait = "0.1.42"
 base64 = "0.13.0"
 bitflags = "1.1.0"
-bson = "2.0.0-beta.3"
+bson = "2.0.0"
 chrono = "0.4.7"
 derivative = "2.1.1"
 futures-core = "0.3.14"