Ensure schema files are updated with the api (#33)

Author: ali-behjati

.github/workflows/pyth-sdk-terra.yml

@@ -23,3 +23,27 @@ jobs:
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+  lints:
+    name: Lints
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ./pyth-sdk-terra
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v2
+
+      - name: Install stable toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: 1.58.1
+          override: true
+          components: clippy
+
+      - name: Generate Schema
+        run: cargo run --example schema
+
+      - name: Schema Changes
+        # fails if any changes not committed
+        run: git diff --exit-code schema