Add CI step to check semver using cargo-semver-checks

Author: matheus-consoli

.github/workflows/ci.yaml

@@ -91,3 +91,11 @@ jobs:
 
     - name: Docs
       run: cargo doc
+
+  semver-checks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Check semver
+        uses: obi1kenobi/cargo-semver-checks-action@v2