Add release workflow.

Author: thejpster

.github/workflows/release.yml

@@ -0,0 +1,45 @@
+on:
+  push:
+    tags:
+    - 'v*' # Push events to matching v*, i.e. v1.0, v20.15.10
+
+name: Upload Release
+
+jobs:
+  build:
+    name: Upload Release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v1
+        with:
+          submodules: true
+      - name: Get Branch Name
+        id: branch_name
+        run: |
+          echo ::set-output name=SOURCE_NAME::${GITHUB_REF#refs/*/}
+          echo ::set-output name=SOURCE_BRANCH::${GITHUB_REF#refs/heads/}
+          echo ::set-output name=SOURCE_TAG::${GITHUB_REF#refs/tags/}
+      - name: Install GCC ARM
+        run: sudo apt-get update && sudo apt-get install -y gcc-arm-none-eabi
+      - name: Add Target
+        run: rustup target add thumbv6m-none-eabi
+      - name: Build Release
+        run: cargo build --release --verbose
+      - name: Create Release
+        id: create_release
+        uses: actions/create-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ steps.branch_name.outputs.SOURCE_TAG }}
+          draft: false
+          prerelease: false
+      - name: Upload files to Release
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            target/thumbv6m-none-eabi/release/neotron-pico-bios
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}