Add CI job to run cargo-semver-checks

.github/workflows/rust.yml

@@ -17,7 +17,7 @@ jobs:
 
   complete:
     if: always()
-    needs: [fmt, check-git-rev-deps, build-and-test, docs, readme]
+    needs: [fmt, check-git-rev-deps, api-compat, build-and-test, docs, readme]
     runs-on: ubuntu-latest
     steps:
     - if: contains(needs.*.result, 'failure') || contains(needs.*.result, 'cancelled')
@@ -60,6 +60,20 @@ jobs:
     - name: Check if rust-analyzer encounters any errors parsing project
       run: rustup run nightly rust-analyzer analysis-stats . 2>&1 | (! grep '^\[ERROR')
 
+  api-compat:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+    - run: rustup update
+    # TODO: Replace with stellar/binaries once
+    # https://github.com/stellar/binaries/pull/17 is merged.
+    - run: cargo install --locked cargo-semver-checks --version 0.27.0
+    # - uses: stellar/binaries@v18
+    #   with:
+    #     name: cargo-semver-checks
+    #     version: 0.27.0
+    - run: cargo semver-checks
+
   build-and-test:
     strategy:
       fail-fast: false