Bump MSRV to Rust 1.48.0

.github/workflows/main.yml

@@ -42,8 +42,8 @@ jobs:
         rust:
           - version: 1.66.1 # STABLE
             features: use-miniscript
-          - version: 1.41.1 # MSRV
-            features: use-miniscript,msrv1411
+          - version: 1.48.0 # MSRV
+            features: use-miniscript
         emulator:
           - name: trezor
           - name: ledger
@@ -84,6 +84,11 @@ jobs:
         run: rustup set profile minimal
       - name: Update toolchain
         run: rustup update
+      - if: ${{matrix.rust.version}} = 1.48.0
+        name: Pin dependencies that use edition 2021
+        # serde 1.0.157 uses syn 2.0 which requires edition 2021.
+        # once_cell v0.15.0 uses edition 2021.
+        run: cargo update -p serde --precise 1.0.156 && cargo update -p once_cell --precise 1.14.0
       - name: Test
         run: cargo test --features ${{ matrix.rust.features }}
       - name: Wipe

CONTRIBUTING.md

@@ -45,7 +45,7 @@ Every new feature should be covered by unit 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 1.41.1 (enforced by our CI).
+The Minimal Supported Rust Version is 1.48.0 (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

@@ -17,12 +17,10 @@ serde = { version = "^1.0", features = ["derive"] }
 serde_json = { version = "^1.0" }
 pyo3 = { version = "0.15.1", features = ["auto-initialize"] }
 base64 = "0.13.0"
-once_cell = { version = "=1.14", optional = true }
 
 [dev-dependencies]
 serial_test = "0.6.0"
 
 [features]
 doctest = []
 use-miniscript = ["miniscript"]
-msrv1411 = ["once_cell"]

README.md

@@ -10,12 +10,7 @@ This library internally uses PyO3 to call HWI's functions. It is not a re-implem
 
 ## MSRV
 
-The MSRV for this project is `1.41.1` but to support this version you must enable the `msrv1411` feature:
-```cargo
-    [dependencies]
-    hwi = { path = "../rust-hwi", features = ["msrv1411"] }
-```
-If the `msrv1411` feature is not enabled you must use at least rust version `1.56.0`.
+The MSRV for this project is `1.48.0`.
 
 ## Prerequisites
 

clippy.toml

@@ -1 +1 @@
-msrv="1.41.1"
+msrv="1.48.0"