Update dependencies and increase MSRV to 1.56

.github/workflows/ci.yml

@@ -26,24 +26,7 @@ jobs:
           shared-key: common
       - name: Cargo check
         run: cargo check --workspace
-  checks_old:
-    name: Check 1.37.0
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout sources
-        uses: actions/checkout@v3
-      - name: Install toolchain
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: 1.37.0
-      - name: Rust cache
-        uses: Swatinem/rust-cache@v2
-        with:
-          shared-key: common
-      - name: Delete Cargo.lock
-        run: rm Cargo.lock
-      - name: Cargo check
-        run: cargo check --all
+
   lints:
     name: Lints
     runs-on: ubuntu-latest
@@ -65,6 +48,7 @@ jobs:
         run: cargo doc --workspace --no-deps
       - name: Cargo clippy
         run: cargo clippy --workspace --tests -- -D warnings
+
   tests:
     name: Test
     runs-on: ubuntu-latest
@@ -87,8 +71,28 @@ jobs:
           shared-key: common
       - name: Cargo test
         run: cargo test --workspace
+
+  checks_old:
+    name: Check 1.56.0
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v3
+      - name: Install toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: 1.56.0
+      - name: Rust cache
+        uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: common
+      - name: Delete Cargo.lock
+        run: rm Cargo.lock
+      - name: Cargo check
+        run: cargo check --all
+
   tests_old:
-    name: Test 1.37.0
+    name: Test 1.56.0
     runs-on: ubuntu-latest
     needs: [checks, lints]
     steps:
@@ -97,7 +101,7 @@ jobs:
       - name: Install toolchain
         uses: dtolnay/rust-toolchain@master
         with:
-          toolchain: 1.37.0
+          toolchain: 1.56.0
       - name: Rust cache
         uses: Swatinem/rust-cache@v2
         with:

Cargo.toml

@@ -4,17 +4,15 @@ description = "Error::sources on stable Rust"
 repository = "https://github.com/parasyte/error-iter"
 version = "1.0.0"
 authors = ["Jay Oster <jay@kodewerx.org>"]
-edition = "2018"
+edition = "2021"
+rust-version = "1.56"
 readme = "README.md"
 keywords = ["error", "iter", "iterator", "recursive", "sources"]
 categories = ["rust-patterns"]
 license = "MIT"
 
-# NOTE: This field was first added in Rust 1.56.0
-rust-version = "1.37"
-
 [badges]
 maintenance = { status = "passively-maintained" }
 
 [dev-dependencies]
-thiserror = "=1.0.39"
+thiserror = "1"

README.md

@@ -11,9 +11,7 @@ Use [`Error::sources`](https://doc.rust-lang.org/nightly/std/error/trait.Error.h
 
 ## MSRV
 
-Supports Rust 1.37.0 and higher.
-
-Compiles on Rust 1.31.0, but does not return the tail source. (Tests fail on anything less than 1.37.0.)
+Supports Rust 1.56.0 and higher.
 
 ## What is this?