Bump actions-rs/cargo from 1 to 1.0.3

Bumps [actions-rs/cargo](https://github.com/actions-rs/cargo) from 1 to 1.0.3.
- [Release notes](https://github.com/actions-rs/cargo/releases)
- [Changelog](https://github.com/actions-rs/cargo/blob/master/CHANGELOG.md)
- [Commits](actions-rs/cargo@v1...v1.0.3)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/rust.yml

@@ -37,7 +37,7 @@ jobs:
           toolchain: stable
           override: true
       - name: 'check dependencies'
-        uses: actions-rs/cargo@v1
+        uses: actions-rs/cargo@v1.0.3
         with:
           command: check
           args: '--all-targets'
@@ -64,12 +64,12 @@ jobs:
           override: true
           components: 'rustfmt, clippy'
       - name: 'run rustfmt'
-        uses: actions-rs/cargo@v1
+        uses: actions-rs/cargo@v1.0.3
         with:
           command: fmt
           args: '--all -- --check'
       - name: 'run clippy'
-        uses: actions-rs/cargo@v1
+        uses: actions-rs/cargo@v1.0.3
         with:
           command: clippy
           args: '--all-targets -- -D warnings'
@@ -93,7 +93,7 @@ jobs:
           toolchain: stable
           override: true
       - name: 'run tests'
-        uses: actions-rs/cargo@v1
+        uses: actions-rs/cargo@v1.0.3
         with:
           command: test
           args: '--all-targets'