adding back snapshot publishing

Author: dvoegelin

.github/workflows/main.yaml

@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [10.x]
+        node-version: [12.x]
 
     steps:
       - uses: actions/checkout@v1
@@ -33,3 +33,21 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
         run: npm run semantic-release
+      - uses: actions/upload-artifact@master
+        with:
+          name: build-artifact
+          path: lib
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - uses: actions/checkout@master
+      - uses: actions/download-artifact@master
+        with:
+          name: build-artifact
+          path: lib
+      - uses: bvkimball/branch-vars@1.0.1
+      - env:
+          API_TOKEN_GITHUB: ${{ secrets.API_TOKEN_GITHUB }}
+        run: sh snapshot-publish