Add codecov to CI

.github/workflows/ci.yml

@@ -15,17 +15,20 @@ jobs:
           override: true
           components: rustfmt, clippy
 
-      - uses: actions-rs/cargo@v1
+      - name: Rustfmt
+        uses: actions-rs/cargo@v1
         with:
           command: fmt
           args: --all -- --check
 
-      - uses: actions-rs/cargo@v1
+      - name: Clippy
+        uses: actions-rs/cargo@v1
         with:
           command: clippy
           args: --all-features --profile test -- -D warnings
 
-      - uses: actions-rs/cargo@v1
+      - name: Test
+        uses: actions-rs/cargo@v1
         with:
           command: test
           args: --all-features
@@ -41,7 +44,27 @@ jobs:
           toolchain: nightly
           override: true
 
-      - uses: actions-rs/cargo@v1
+      - name: Build (release)
+        uses: actions-rs/cargo@v1
         with:
           command: build
           args: --all-features --release
+
+  codecov:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: nightly
+          override: true
+
+      - uses: actions-rs/tarpaulin@v0.1
+        with:
+          args: '--all-features'
+
+      - uses: codecov/codecov-action@v1
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}