Update CI.

Update checkoud, Use @dtolnay s rust-toolchain, and a problem-matcher.

.github/workflows/ci.yml

@@ -5,48 +5,32 @@ on: [push, pull_request]
 name: CI
 
 jobs:
-  fmt:
+  rustfmt:
     name: Rustfmt
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install toolchain
-        uses: actions-rs/toolchain@v1
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
-          override: true
+          components: rustfmt
+      - run: echo "::add-matcher::.github/workflows/rust-problem-matcher.json"
+      - run: cargo fmt --all -- --check
 
-      - name: Install rustfmt
-        run: rustup component add rustfmt
-
-      - name: Run cargo fmt
-        uses: actions-rs/cargo@v1
+  clippy:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          command: fmt
-          args: --all -- --check
+          components: clippy
+      - run: echo "::add-matcher::.github/workflows/rust-problem-matcher.json"
+      - run: cargo clippy --all-features
 
   test:
     name: Test Suite
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        rust:
-          - stable
-          - beta
-          - nightly
     steps:
-      - name: Checkout sources
-        uses: actions/checkout@v2
-
-      - name: Install toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: ${{ matrix.rust }}
-          override: true
-
-      - name: Run cargo test
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
+      - uses: actions/checkout@v3
+      - uses: dtolnay/rust-toolchain@stable
+      - run: echo "::add-matcher::.github/workflows/rust-problem-matcher.json"
+      - run: cargo test -q

.github/workflows/rust-problem-matcher.json

@@ -0,0 +1,21 @@
+{
+    "problemMatcher": [
+        {
+            "owner": "rust",
+            "pattern": [
+                {
+                    "regexp": "^(?:\\x1b\\[[\\d;]+m)*(warning|warn|error)(?:\\x1b\\[[\\d;]+m)*(\\[(.*)\\])?(?:\\x1b\\[[\\d;]+m)*:(?:\\x1b\\[[\\d;]+m)* ([^\\x1b]*)(?:\\x1b\\[[\\d;]+m)*$",
+                    "severity": 1,
+                    "message": 4,
+                    "code": 3
+                },
+                {
+                    "regexp": "^(?:\\x1b\\[[\\d;]+m)*\\s*(?:\\x1b\\[[\\d;]+m)*\\s*--> (?:\\x1b\\[[\\d;]+m)*(.*):(\\d*):(\\d*)(?:\\x1b\\[[\\d;]+m)*$",
+                    "file": 1,
+                    "line": 2,
+                    "column": 3
+                }
+            ]
+        }
+    ]
+}