THRIFT-5306: Rust code and generated code no longer has clippy warnings (Rust 1.40)

Client: rs

NOTE: Also properly update the min/max supported Rust versions
diff --git a/test/rs/Cargo.toml b/test/rs/Cargo.toml
index deffd21..8a85d7c 100644
--- a/test/rs/Cargo.toml
+++ b/test/rs/Cargo.toml
@@ -8,10 +8,8 @@
 
 [dependencies]
 clap = "2.33"
-env_logger = "0.4.0"
+env_logger = "0.8"
 log = "0.4"
-ordered-float = "1.0"
-try_from = "0.3"
 
 [dependencies.thrift]
 path = "../../lib/rs"