feat: add no-std support

closes #5

.github/workflows/ci.yml

@@ -7,14 +7,39 @@ on:
     types: [opened, repoened, synchronize]
 
 jobs:
-  test:
-    name: Test Rust ${{matrix.toolchain}} on ${{matrix.os}}
+  build:
+    name: Build ${{matrix.toolchain}} on ${{matrix.os}} with ${{matrix.args}}
     runs-on: ${{matrix.os}}-latest
     strategy:
       fail-fast: false
       matrix:
         toolchain: [stable, nightly]
         os: [ubuntu]
+        target: [wasm32-unknown-unknown]
+        args: [--no-default-features --target wasm32-unknown-unknown]
+    steps:
+      - uses: actions/checkout@main
+      - name: Install rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{matrix.toolchain}}
+          override: true
+      - run: rustup target add ${{matrix.target}}
+      - name: Test
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: ${{matrix.args}}
+
+  test:
+    name: Test ${{matrix.toolchain}} on ${{matrix.os}} with ${{matrix.features}}
+    runs-on: ${{matrix.os}}-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        toolchain: [stable, nightly]
+        os: [ubuntu]
+        features: [--all-features, --no-default-features]
     steps:
       - uses: actions/checkout@main
       - name: Install rust
@@ -26,25 +51,29 @@ jobs:
         uses: actions-rs/cargo@v1
         with:
           command: test
+          args: ${{matrix.features}}
 
   clippy:
-    name: Clippy
+    name: Clippy with ${{matrix.features}}
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        features: [--all-features, --no-default-features]
     steps:
       - uses: actions/checkout@main
-      - name: Install minimal stable with clippy
+      - name: Install minimal nightly with clippy
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: stable
+          toolchain: nightly
           components: clippy
           override: true
-
       - name: Clippy
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --all -- -D clippy::all -D warnings
+          args: --all ${{matrix.features}} -- -D clippy::all -D warnings
 
   rustfmt:
     name: rustfmt