cicd: run clippy and dependabot

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    # Check for updates every Monday
+    schedule:
+      interval: "weekly"

.github/workflows/build.yml

@@ -12,6 +12,8 @@ jobs:
     - uses: actions/checkout@v2
     - name: Install Rust toolchain
       uses: dtolnay/rust-toolchain@stable
+    - name: Run Clippy
+      run: cargo clippy --all-targets --all-features
     - name: Build
       run: cargo build --verbose
     - name: Run tests