Dry run subcrate publish action

.github/workflows/publish-crate-dry-run.yml

@@ -0,0 +1,40 @@
+name: PublishDryRun
+
+on:
+  workflow_dispatch
+  inputs:
+    crate:
+      required: true
+      type: choice
+      description: Crate to publish
+      options: 
+      - edge-std-nal-async
+      - embedded-nal-async-xtra
+      - edge-captive
+      - edge-dhcp
+      - edge-http
+      - edge-mdns
+      - edge-mqtt
+      - edge-raw
+      - edge-ws
+
+env:
+  rust_toolchain: stable
+
+jobs:
+  publishdryrun:
+    name: Publish Dry Run
+    runs-on: ubuntu-latest
+    steps:
+      - name: Setup | Checkout
+        uses: actions/checkout@v2
+      - name: Setup | Rust
+        uses: actions-rs/toolchain@v1
+        with:
+          toolchain: ${{ env.rust_toolchain }}
+      - name: Setup | Std
+        run: rustup component add rust-src --toolchain ${{ env.rust_toolchain }}-x86_64-unknown-linux-gnu
+      - name: Setup | Set default toolchain
+        run: rustup default ${{ env.rust_toolchain }}
+      - name: Build | Publish Dry Run
+        run: cd "${{ github.event.inputs.crate }}; cargo publish --dry-run