upgrade MSRV to 1.36

.github/workflows/rust.yml

@@ -18,7 +18,7 @@ jobs:
           - rust: nightly
             env:
               DUMMY: true
-          - rust: 1.29.0
+          - rust: 1.36.0
             env:
               PIN_VERSIONS: true
     steps:

README.md

@@ -9,15 +9,5 @@ structures and network messages related to Elements
 
 
 ## Minimum Supported Rust Version (MSRV)
-This library should always compile with any combination of features on **Rust 1.29**.
 
-Because some dependencies have broken the build in minor/patch releases, to
-compile with 1.29.0 you will need to run the following version-pinning command:
-```
-cargo update -p cc --precise "1.0.41" --verbose
-```
-In order to have serde support, the following versions also need to be pinned:
-```
-cargo update --package "serde" --precise "1.0.98"
-cargo update --package "serde_derive" --precise "1.0.98"
-```
+This library should always compile with any combination of features on **Rust 1.36**.

contrib/test.sh

@@ -2,19 +2,6 @@
 
 FEATURES="serde-feature"
 
-pin_common_verions() {
-    cargo generate-lockfile --verbose
-    cargo update -p cc --precise "1.0.41" --verbose
-    cargo update -p serde --precise "1.0.98" --verbose
-    cargo update -p serde_derive --precise "1.0.98" --verbose
-}
-
-# Pin `cc` for Rust 1.29
-if [ -n "$PIN_VERSIONS" ]; then
-    pin_common_verions
-fi
-
-
 # Use toolchain if explicitly specified
 if [ -n "$TOOLCHAIN" ]
 then

src/address.rs

@@ -19,10 +19,6 @@ use std::error;
 use std::fmt;
 use std::str::FromStr;
 
-// AsciiExt is needed until for Rust 1.26 but not for newer versions
-#[allow(unused_imports, deprecated)]
-use std::ascii::AsciiExt;
-
 use bitcoin::bech32::{self, u5, FromBase32, ToBase32};
 use bitcoin::util::base58;
 use bitcoin::PublicKey;

src/blech32.rs

@@ -42,10 +42,6 @@
 
 use std::fmt;
 
-// AsciiExt is needed until for Rust 1.26 but not for newer versions
-#[allow(unused_imports, deprecated)]
-use std::ascii::AsciiExt;
-
 use bitcoin::bech32::{u5, Error};
 
 /// Encode a bech32 payload to an [fmt::Formatter].