CI fix

.editorconfig

@@ -9,3 +9,6 @@ insert_final_newline = true
 indent_style = space
 indent_size = 4
 trim_trailing_whitespace = true
+
+[*.yml]
+indent_size = 2

.github/workflows/rust.yml

@@ -20,6 +20,13 @@ jobs:
           - 1.51.0 # MSVR
     steps:
       - uses: actions/checkout@v2
+      # Important preparation step: override the latest default Rust version in GitHub CI
+      # with the current value of the iteration in the "strategy.matrix.rust"-array.
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: default
+          toolchain: ${{ matrix.rust }}
+          override: true
       - name: Build
         run: cargo build --all-targets --verbose --features all
       # use some arbitrary no_std target
@@ -36,10 +43,15 @@ jobs:
       matrix:
         rust:
           - stable
-                    - nightly
-                    - 1.51.0 # MSVR
     steps:
       - uses: actions/checkout@v2
+      # Important preparation step: override the latest default Rust version in GitHub CI
+      # with the current value of the iteration in the "strategy.matrix.rust"-array.
+      - uses: actions-rs/toolchain@v1
+        with:
+          profile: default
+          toolchain: ${{ matrix.rust }}
+          override: true
       - name: Rustfmt
         run: cargo fmt -- --check
       - name: Clippy