Release with GitHub Actions (#117)

* Release with GitHub Actions

* Delete .travis.yml

Author: poslegm

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+name: Release
+on:
+  push:
+    branches: [master]
+    tags: ["*"]
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v1
+      - uses: olafurpg/setup-scala@v2
+      - uses: olafurpg/setup-gpg@v2
+      - run: git fetch --tags || true
+      - name: Publish ${{ github.ref }}
+        run: sbt ci-release
+        env:
+          PGP_PASSPHRASE: ${{ secrets.PGP_PASSPHRASE }}
+          PGP_SECRET: ${{ secrets.PGP_SECRET }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}