Add clippy msrv and update allowed lints

.clippy.toml

@@ -0,0 +1 @@
+msrv = "1.43.0"

build.rs

@@ -1,3 +1,5 @@
+#![allow(clippy::style)]
+
 
 use std::env;
 use std::fs::File;

src/lib.rs

@@ -40,12 +40,13 @@
 //! println!("Input ({}) with 10 decimals: {} vs {})", input, dec, float);
 //! ```
 #![cfg_attr(not(feature = "std"), no_std)]
+#![allow(clippy::style)]
 #![allow(clippy::unreadable_literal)]
 #![allow(clippy::needless_return)]
 #![allow(clippy::suspicious_arithmetic_impl)]
 #![allow(clippy::suspicious_op_assign_impl)]
 #![allow(clippy::redundant_field_names)]
-#![allow(clippy::match_like_matches_macro)] // requires Rust 1.42.0
+
 
 pub extern crate num_bigint;
 pub extern crate num_traits;