Switch from actions-rs/toolchain to dtolnay/rust-toolchain

.github/workflows/rust.yml

@@ -21,11 +21,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@master
         with:
-          profile: minimal
           toolchain: ${{ matrix.rust }}
-          override: true
       - uses: actions-rs/cargo@v1
         with:
           command: build
@@ -43,11 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
-        with:
-          profile: minimal
-          toolchain: "1.70.0"
-          override: true
+      - uses: dtolnay/rust-toolchain@1.70
       - uses: actions-rs/cargo@v1
         with:
           command: check
@@ -57,11 +51,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions-rs/toolchain@v1
+      - uses: dtolnay/rust-toolchain@stable
         with:
-          profile: minimal
           toolchain: stable
-          override: true
           components: rustfmt, clippy, rust-docs
       - uses: actions-rs/cargo@v1
         with: