Update MSRV to 1.51, enable cargo resolver = "2"

This is required to keep using dependencies that have switched to
MSRV 1.51 which requires the resolver version 2: tiny-bip39, ahash, and object.

.github/workflows/cont_integration.yml

@@ -11,7 +11,7 @@ jobs:
       matrix:
         rust:
           - 1.53.0 # STABLE
-          - 1.46.0 # MSRV
+          - 1.51.0 # MSRV
         features:
           - default
           - minimal

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- New minimum supported rust version is 1.51.0 to support `resolver = "2"`
 
 ## [v0.12.0] - [v0.11.0]
 

CONTRIBUTING.md

@@ -46,7 +46,7 @@ Every new feature should be covered by functional tests where possible.
 When refactoring, structure your PR to make it easy to review and don't
 hesitate to split it into multiple small, focused PRs.
 
-The Minimal Supported Rust Version is 1.46 (enforced by our CI).
+The Minimal Supported Rust Version is 1.51 (enforced by our CI).
 
 Commits should cover both the issue fixed and the solution's rationale.
 These [guidelines](https://chris.beams.io/posts/git-commit/) should be kept in mind.

Cargo.toml

@@ -10,6 +10,7 @@ description = "A modern, lightweight, descriptor-based wallet library"
 keywords = ["bitcoin", "wallet", "descriptor", "psbt"]
 readme = "README.md"
 license = "MIT OR Apache-2.0"
+resolver = "2"
 
 [dependencies]
 bdk-macros = "^0.6"
@@ -24,7 +25,7 @@ rand = "^0.7"
 sled = { version = "0.34", optional = true }
 electrum-client = { version = "0.8", optional = true }
 rusqlite = { version = "0.25.3", optional = true }
-ahash = { version = "=0.7.4", optional = true }
+ahash = { version = "0.7", optional = true }
 reqwest = { version = "0.11", optional = true, features = ["json"] }
 ureq = { version = "2.1", features = ["json"], optional = true }
 futures = { version = "0.3", optional = true }
@@ -34,10 +35,7 @@ cc = { version = ">=1.0.64", optional = true }
 socks = { version = "0.3", optional = true }
 lazy_static = { version = "1.4", optional = true }
 
-# the latest 0.8 version of tiny-bip39 depends on zeroize_derive 1.2 which has MSRV 1.51 and our 
-# MSRV is 1.46, to fix this until we update our MSRV or replace the tiny-bip39 
-# dependency https://github.com/bitcoindevkit/bdk/issues/399 we can only use an older version
-tiny-bip39 = { version = "< 0.8", optional = true }
+tiny-bip39 = { version = "0.8", optional = true }
 
 bitcoinconsensus = { version = "0.19.0-3", optional = true }
 

README.md

@@ -13,7 +13,7 @@
     <a href="https://github.com/bitcoindevkit/bdk/actions?query=workflow%3ACI"><img alt="CI Status" src="https://github.com/bitcoindevkit/bdk/workflows/CI/badge.svg"></a>
     <a href="https://codecov.io/gh/bitcoindevkit/bdk"><img src="https://codecov.io/gh/bitcoindevkit/bdk/branch/master/graph/badge.svg"/></a>
     <a href="https://docs.rs/bdk"><img alt="API Docs" src="https://img.shields.io/badge/docs.rs-bdk-green"/></a>
-    <a href="https://blog.rust-lang.org/2020/08/27/Rust-1.46.0.html"><img alt="Rustc Version 1.46+" src="https://img.shields.io/badge/rustc-1.46%2B-lightgrey.svg"/></a>
+    <a href="https://blog.rust-lang.org/2020/08/27/Rust-1.51.0.html"><img alt="Rustc Version 1.51+" src="https://img.shields.io/badge/rustc-1.51%2B-lightgrey.svg"/></a>
     <a href="https://discord.gg/d7NkDKm"><img alt="Chat on Discord" src="https://img.shields.io/discord/753336465005608961?logo=discord"></a>
   </p>