Moves publish logic into main build workflow

Signed-off-by: Albert Pastrana <albert.pastrana@intenthq.com>

Author: albertpastrana

.github/workflows/build.yml

@@ -4,6 +4,8 @@ on:
   push:
     branches:
         - main
+    tags:
+      - 'v*'
   pull_request:
     branches:
         - main
@@ -13,7 +15,6 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
@@ -27,3 +28,21 @@ jobs:
       env:
         GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
       run: sbt test
+
+  publish:
+    runs-on: ubuntu-latest
+    needs: build
+    timeout-minutes: 10
+    if: ${{ github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')}}
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: coursier/cache-action@v3
+      - name: Set up JDK 1.8
+        uses: actions/setup-java@v1
+        with:
+          java-version: 1.8
+      - name: Publish library
+        env:
+          GITHUB_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+        run: sbt publish