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](https://github.com/actions-rs/cargo/compare/v1...v1.0.3)

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

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
       with:
         toolchain: nightly
         override: true
-    - uses: actions-rs/cargo@v1
+    - uses: actions-rs/cargo@v1.0.3
       with:
         command: test
         args: --all-features