feat(ci): add workflow

Author: DevBlocky

.github/workflows/ci.yml

@@ -0,0 +1,106 @@
+name: CI
+
+on:
+    pull_request:
+    push:
+        branches:
+            - main
+
+env:
+    RUST_BACKTRACE: 1
+    CI: 1
+
+jobs:
+    style:
+        name: Check Style
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+            - uses: actions-rs/toolchain@v1
+              with:
+                  toolchain: stable
+                  components: rustfmt,clippy
+                  profile: minimal
+
+            - name: cargo fmt -- --check
+              uses: actions-rs/cargo@v1
+              with:
+                  command: fmt
+                  args: -- --check
+
+    test:
+        name: Test ${{ matrix.name }}
+        runs-on: ${{ matrix.os || 'ubuntu-latest' }}
+        needs: [style]
+
+        strategy:
+            matrix:
+                name:
+                    - linux / stable
+                    - linux / beta
+                    - linux / nightly
+                    - macos / stable
+                    - windows / stable-x86_64-msvc
+                    - windows / stable-i686-msvc
+                    - windows / stable-x86_64-gnu
+                    - windows / stable-i686-gnu
+                include:
+                    - name: linux / stable
+                    - name: linux / beta
+                      rs_toolchain: beta
+                    - name: linux / nightly
+                      rs_toolchain: nightly
+
+                    - name: macos / stable
+                      os: macos-latest
+
+                    - name: windows / stable-x86_64-msvc
+                      os: windows-latest
+                      rs_target: x86_64-pc-windows-msvc
+                    - name: windows / stable-i686-msvc
+                      os: windows-latest
+                      rs_target: i686-pc-windows-msvc
+                    - name: windows / stable-x86_64-gnu
+                      os: windows-latest
+                      rs_target: x86_64-pc-windows-gnu
+                    - name: windows / stable-i686-gnu
+                      os: windows-latest
+                      rs_target: i686-pc-windows-gnu
+
+        steps:
+            - uses: actions/checkout@v2
+            - uses: actions-rs/toolchain@v1
+              with:
+                  toolchain: ${{ matrix.rs_toolchain || 'stable' }}
+                  target: ${{ matrix.rs_target }}
+                  profile: minimal
+
+            - name: cargo build
+              uses: actions-rs/cargo@v1
+              with:
+                  command: build
+
+            - name: cargo test -- --test-threads 1
+              uses: actions-rs/cargo@v1
+              with:
+                  command: test
+                  args: -- --test-threads 1
+
+    docs:
+        name: Docs
+        runs-on: ubuntu-latest
+
+        steps:
+            - uses: actions/checkout@v2
+            - uses: actions-rs/toolchain@v1
+              with:
+                  toolchain: stable
+                  profile: minimal
+
+            - name: Check Documentation
+              env:
+                  RUSTDOCFLAGS: -D warnings
+              uses: actions-rs/cargo@v1
+              with:
+                  command: doc
+                  args: --no-deps --all-features