Merge #383: integration_test: Enable edition 2018

3188d06 Remove unneeded import (Tobin C. Harding)
abb2f55 Use the anonymous lifetime (Tobin C. Harding)
45a5d49 Enable edition 2018 (Tobin C. Harding)

Pull request description:

  As we did for the main crate, enable edition 2018 in the `integration_test` crate.

ACKs for top commit:
  apoelstra:
    ACK 3188d06
  sanket1729:
    ACK 3188d06

Tree-SHA512: 8183cbc074a36175f1a7f723e89629577e13c646274730abc4bb9b5e16c2a250dad4dfb4059283ab7523d9586d9728f0b381afe991e9ec51c9ea641b5dc60480

Author: sanket1729

integration_test/Cargo.toml

@@ -2,6 +2,7 @@
 name = "integration_tests_miniscript"
 version = "0.1.0"
 authors = ["Steven Roose <[email protected]>", "Sanket K <[email protected]>"]
+edition = "2018"
 
 [dependencies]
 miniscript = {path = "../"}

integration_test/src/main.rs

@@ -2,12 +2,6 @@
 //!
 //! This is how some external user would use rust-miniscript
 
-extern crate bitcoincore_rpc;
-extern crate log;
-
-extern crate bitcoin;
-extern crate miniscript;
-
 use bitcoincore_rpc::{Auth, Client, RpcApi};
 
 mod test_cpp;
@@ -18,11 +12,11 @@ use crate::test_util::TestData;
 struct StdLogger;
 
 impl log::Log for StdLogger {
-    fn enabled(&self, metadata: &log::Metadata) -> bool {
+    fn enabled(&self, metadata: &log::Metadata<'_>) -> bool {
         metadata.target().contains("jsonrpc") || metadata.target().contains("bitcoincore_rpc")
     }
 
-    fn log(&self, record: &log::Record) {
+    fn log(&self, record: &log::Record<'_>) {
         if self.enabled(record.metadata()) {
             println!(
                 "[{}][{}]: {}",

integration_test/src/test_util.rs

@@ -17,15 +17,12 @@
 //! The keys/hashes are automatically translated so that the tests knows how to satisfy things that don't end with !
 //!
 
-extern crate rand;
-
-use self::rand::RngCore;
 use bitcoin::hashes::{hex::ToHex, Hash};
 use miniscript::descriptor::{SinglePub, SinglePubKey};
 use miniscript::{Descriptor, DescriptorPublicKey, Miniscript, ScriptContext, TranslatePk};
+use rand::RngCore;
 use std::str::FromStr;
 
-use bitcoin;
 use bitcoin::hashes::{hash160, ripemd160, sha256, sha256d};
 use bitcoin::secp256k1;