ci: Add minimal-versions check

Author: taiki-e

.github/workflows/ci.yml

@@ -47,12 +47,13 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install Rust
         run: rustup update ${{ matrix.rust }} && rustup default ${{ matrix.rust }}
-      - name: Install cargo-hack
+      - name: Install cargo-hack and cargo-minimal-versions
         uses: taiki-e/install-action@v2
         with:
-          tool: cargo-hack
+          tool: cargo-hack,cargo-minimal-versions
       - run: cargo build --all --all-features --all-targets
       - run: cargo hack build --feature-powerset --no-dev-deps
+      - run: cargo minimal-versions build --all --all-features
       - run: cargo test
         if: >
           !contains(matrix.os, 'windows')