CI: Run cargo-semver-checks for every PR and commits to main (#1053)

.github/workflows/main.yml

@@ -237,3 +237,11 @@ jobs:
         shell: bash
       - uses: Swatinem/rust-cache@v2
       - run: cargo fmt -- --check
+
+  semver-checks:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Check semver
+        uses: obi1kenobi/cargo-semver-checks-action@v2