Add GitHub Actions workflow for CI

.github/workflows/ci.yml

@@ -0,0 +1,185 @@
+name: CI
+
+on: [push, pull_request]
+
+env:
+  RUST_MINVERSION: 1.37.0
+
+jobs:
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        rust:
+          - stable
+          - beta
+          - nightly
+          - 1.44.0
+
+        features:
+          - '--features "regexp"'
+
+        include:
+          - rust: stable
+            features: ''
+          - rust: stable
+            features: '--features "std lexical regexp"'
+          - rust: stable
+            features: '--no-default-features'
+          - rust: stable
+            features: '--no-default-features --features "alloc"'
+          - rust: nightly
+            features: ''
+          - rust: nightly
+            features: '--no-default-features'
+          - rust: nightly
+            features: '--no-default-features --features "alloc"'
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust (${{ matrix.rust }})
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ matrix.rust }}
+          profile: minimal
+          override: true
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --verbose ${{ matrix.features }}
+
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --verbose ${{ matrix.features }}
+
+  minrust:
+    name: Test MSRV
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust (${{ env.RUST_MINVERSION }})
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.RUST_MINVERSION }}
+          profile: minimal
+          override: true
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --verbose --no-default-features --features "regexp lexical"
+
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          command: test
+          args: --verbose --no-default-features --features "regexp lexical"
+
+  bench:
+    name: Bench
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          profile: minimal
+          override: true
+
+      - name: Compile bench
+        uses: actions-rs/cargo@v1
+        with:
+          command: bench
+          args: --verbose --no-run --features "regexp"
+
+      - name: Run bench
+        uses: actions-rs/cargo@v1
+        with:
+          command: bench
+          args: --verbose --features "regexp"
+
+  doc:
+    name: Build documentation
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          profile: minimal
+          override: true
+
+      - name: Build
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --verbose --features "std lexical regexp"
+
+  fmt:
+    name: Check formatting
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          components: rustfmt
+          profile: minimal
+          override: true
+
+      - name: cargo fmt -- --check
+        continue-on-error: true
+        uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: -- --check
+
+  coverage:
+    name: Coverage
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+
+      - name: Install cargo-tarpaulin
+        uses: actions-rs/cargo@v1
+        with:
+          command: install
+          args: cargo-tarpaulin
+
+      - name: Run cargo tarpaulin
+        uses: actions-rs/cargo@v1
+        with:
+          command: tarpaulin