chore: improve github actions (#104)

Signed-off-by: koushiro <koushiro.cqx@gmail.com>

Author: koushiro

.github/codecov.yml

@@ -0,0 +1,3 @@
+coverage:
+  status:
+    patch: off

.github/workflows/build.yml

@@ -1,85 +1,98 @@
-on: [push, pull_request]
-
 name: build
 
+on: [push, pull_request]
+
 jobs:
   build:
-    name: Lints and Test
+    name: Build
     strategy:
+      fail-fast: false
       matrix:
         platform: [ubuntu-latest, macos-latest, windows-latest]
         toolchain: [stable]
     runs-on: ${{ matrix.platform }}
 
     steps:
-      - name: Checkout sources
+      - name: Checkout Sources
         uses: actions/checkout@v2
 
-      - name: Install Rust toolchain
+      - name: Cache Dependencies & Build Outputs
+        uses: actions/cache@v2
+        with:
+          path: ~/.cargo
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Install Rust Toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.toolchain }}
           override: true
           components: rustfmt, clippy
 
-      - name: Run cargo fmt
+      - name: Check Code Format
         uses: actions-rs/cargo@v1
         with:
           command: fmt
           args: --all -- --check
 
-      - name: Run cargo clippy
+      - name: Code Lint
         uses: actions-rs/cargo@v1
         with:
           command: clippy
           args: --all-targets --all-features --workspace -- -D warnings
 
-      - name: Run cargo test
+      - name: Code Lint Without Default Features
+        uses: actions-rs/cargo@v1
+        with:
+          command: clippy
+          args: --no-default-features --workspace -- -D warnings
+
+      - name: Test
         uses: actions-rs/cargo@v1
         with:
           command: test
           args: --all-features --workspace
 
-  coverage:
-    name: Code Coverage
+  ensure_no_std:
+    name: Ensure no_std
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout sources
+      - name: Checkout Sources
         uses: actions/checkout@v2
 
-      - name: Install stable Rust toolchain
+      - name: Install Rust Toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: stable
           override: true
+          target: thumbv6m-none-eabi
 
-      - name: Run cargo-tarpaulin
-        uses: actions-rs/tarpaulin@v0.1
+      - name: Build
+        uses: actions-rs/cargo@v1
         with:
-          args: '--all-features -- --test-threads 1'
+          command: build
+          args: --no-default-features --workspace --target thumbv6m-none-eabi
 
-      - name: Upload to codecov.io
-        uses: codecov/codecov-action@v1.0.6
-
-  no-default-features:
-    name: Clippy with no default features (for no_std envs)
+  coverage:
+    name: Code Coverage
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout sources
+      - name: Checkout Sources
         uses: actions/checkout@v2
 
-      - name: Install Rust toolchain
+      - name: Install Rust Toolchain
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: stable
           override: true
-          components: clippy
 
-      - name: Run cargo clippy
-        uses: actions-rs/cargo@v1
+      - name: Generate Code Coverage
+        uses: actions-rs/tarpaulin@v0.1
         with:
-          command: clippy
-          args: --no-default-features --workspace -- -D warnings
+          args: --all-features
+
+      - name: Upload Code Coverage
+        uses: codecov/codecov-action@v1