Add prerelease.

Author: negative0

.github/workflows/prerelease.yml

@@ -0,0 +1,60 @@
+name: Pre Release
+
+on:
+  [push]
+jobs:
+  build:
+
+    strategy:
+      matrix:
+        platform: [ubuntu-latest, macos-latest, windows-latest]
+        node-version: [8.x, 10.x, 12.x]
+
+    steps:
+      - uses: actions/checkout@v1
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: npm install, build, and test
+        run: |
+          npm ci
+          npm run test:cov
+          npm run build
+        env:
+          CI: true
+      - name: Zip build
+        run: |
+          zip -r currentbuild.zip build
+      - name: Deploy to gh-pages
+        if: success()
+        uses: crazy-max/ghaction-github-pages@v1
+        with:
+          target_branch: gh-pages
+          build_dir: build
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create Release
+        id: create_release
+        uses: actions/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ github.ref }}
+          release_name: Release ${{ github.ref }}
+          draft: false
+          prerelease: true
+
+      - name: Upload Release Asset
+        id: upload-release-asset
+        if: success()
+        uses: actions/[email protected]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }} # This pulls from the CREATE RELEASE step above, referencing it's ID to get its outputs object, which include a `upload_url`. See this blog post for more info: https://jasonet.co/posts/new-features-of-github-actions/#passing-data-to-future-steps
+          asset_path: ./currentbuild.zip
+          asset_name: currentbuild.zip
+          asset_content_type: application/zip
+