update github actions

Author: davidhewitt

.github/dependabot.yml

@@ -9,3 +9,8 @@ updates:
     directory: "/" # Location of package manifests
     schedule:
       interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 
 env:
@@ -14,10 +14,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
-          profile: minimal
           components: rustfmt
       - name: Check rust formatting (rustfmt)
         run: cargo fmt --all -- --check
@@ -26,16 +24,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
-          profile: minimal
           components: clippy
       - run: cargo clippy --all
 
   build:
     needs: [fmt] # don't wait for clippy as fails rarely and takes longer
-    name: python${{ matrix.python-version }}-${{ matrix.platform.python-architecture }} ${{ matrix.platform.os }}
+    name: python${{ matrix.python-version }} ${{ matrix.platform.os }}
     runs-on: ${{ matrix.platform.os }}
     strategy:
       fail-fast: false  # If one platform fails, allow the rest to keep testing.
@@ -57,12 +53,9 @@ jobs:
           architecture: x64
 
       - name: Install Rust toolchain
-        uses: actions-rs/toolchain@v1
+        uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: stable
           target: ${{ matrix.platform.rust-target }}
-          profile: minimal
-          default: true
 
       - name: Build without default features
         run: cargo test --no-default-features --verbose --target ${{ matrix.platform.rust-target }}
@@ -83,21 +76,14 @@ jobs:
             target
           key: coverage-cargo-${{ hashFiles('**/Cargo.toml') }}
         continue-on-error: true
-      - name: install cargo-llvm-cov
-        run: |
-          wget https://github.com/taiki-e/cargo-llvm-cov/releases/download/v${CARGO_LLVM_COV_VERSION}/cargo-llvm-cov-x86_64-unknown-linux-gnu.tar.gz -qO- | tar -xzvf -
-          mv cargo-llvm-cov ~/.cargo/bin
-        env:
-          CARGO_LLVM_COV_VERSION: 0.1.9
-      - uses: actions-rs/toolchain@v1
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@cargo-llvm-cov
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          toolchain: nightly
-          override: true
-          profile: minimal
           components: llvm-tools-preview
       - run: |
           cargo llvm-cov clean
-          cargo llvm-cov --lcov --output-path coverage.lcov
+          cargo llvm-cov --codecov --output-path codecov.json
       - uses: codecov/codecov-action@v2
         with:
-          file: coverage.lcov
+          file: codecov.json