specify MSRV for clippy, fix Cargo.toml

Author: RCasatta

Cargo.toml

@@ -1,12 +1,12 @@
 [package]
 name = "bitcoind"
-version = "0.28.1"
+version = "0.29.0"
 authors = ["Riccardo Casatta <riccardo@casatta.it>"]
 description = "Utility to run a regtest bitcoind process, useful in integration testing environment"
 license = "MIT"
 repository = "https://github.com/RCasatta/bitcoind"
 documentation = "https://docs.rs/bitcoind/"
-rust-version = "1.57"
+rust-version = "1.41.1"  # without features, with any feature is 1.57
 edition = "2018"
 
 [dependencies]

clippy.toml

@@ -0,0 +1 @@
+msrv = "1.41.1"

src/lib.rs

@@ -295,7 +295,6 @@ impl BitcoinD {
             conf_args
         );
 
-        #[allow(clippy::needless_borrow)] // would break 1.41.1 if fixed
         let mut process = Command::new(exe.as_ref())
             .args(&default_args)
             .args(&p2p_args)