Use Github Action to automatically publish crate to crate.io

.github/workflows/publish.yaml

@@ -0,0 +1,29 @@
+on:
+  create:
+    tags:
+      - v*
+
+name: Publish Crate
+
+jobs:
+  publish:
+    name: Deploy a new version of Rspotify to crate.io
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v2
+
+      - name: Install Rust toolchain
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          profile: minimal
+          override: true
+
+      - name: Release
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}
+        shell: bash
+        run: |
+          # Publishing crates
+          "${GITHUB_WORKSPACE}/tools/publish.sh"

tools/publish.sh

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+# If crate A depends on crate B, B must come before A in this list
+crates=(
+    rspotify-macros
+    rspotify-model
+    rspotify-http
+)
+
+for crate in "${crates[@]}"; do
+    echo "Publishing ${crate}"
+    (
+        cd "$crate"
+        cargo publish --no-verify
+    )
+    sleep 20
+done
+
+cargo publish