Use the v3 resolver for msrv compliant versoins

.github/workflows/ci.yml

@@ -7,7 +7,6 @@ on:
   pull_request:
 
 jobs:
-  # Proxy application is not as strict as protocol library.
   proxy:
     runs-on: ubuntu-latest
     strategy:

Cargo.toml

@@ -1,3 +1,12 @@
 [workspace]
 members = ["protocol", "proxy"]
+# Resolving transitive dependencies which are MSRV compliant with resolver v3,
+# but the v3 resolver is only available in rustc > 1.84.0.
+#
+# 1. Update workspace resolver setting to `3`.
+# 2. Hop over to a toolchain with rust version > 1.84.0.
+# 3. Run `cargo update` to fix up lock file versions.
+# 4. Set workspace resolver setting back to `2` to support MSRV.
+#
+# Once MSRV > 1.84.0 this setting can be dropped since the default is then v3.
 resolver = "2"

proxy/Cargo.toml

@@ -6,7 +6,6 @@ license-file = "LICENSE"
 description = "BIP324 proxy enabling v1-only clients to use the v2 Bitcoin P2P Protocol"
 repository = "https://github.com/rust-bitcoin/bip324"
 readme = "README.md"
-rust-version = "1.63.0"
 
 [package.metadata.configure_me]
 spec = "config_spec.toml"