Attempt release from GitHub.

.github/workflows/deploy.yml

@@ -0,0 +1,25 @@
+name: release
+
+on: 
+  push:
+    branches: 
+      - release
+
+jobs:
+  release:
+    name: Release new version
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+      - uses: actions/setup-java@v1
+        with:
+          java-version: 8
+          architecture: x64
+      - name: Import GPG keys
+        run: |
+          echo "${{ secret.gpg_public }}" | gpg --import
+          echo "${{ secret.gpg_secret }}" | gpg --import
+      - name: Release project
+        run: ./mvnw -s release.settings.xml release:prepare release:perform -DdryRun=true -pl !byte-buddy-gradle-plugin -Dbintray.username=${{ secret.bintray_username }} -Dbintray.password=${{ secret.bintray_password }} -Dgpg.passphrase=${{ secret.gpg_passphrase }} -Dgradle.publish.key=${{ secret.gradle_key }} -Dgradle.publish.secret=${{ secret.gradle_secret }}

release.settings.xml

@@ -0,0 +1,9 @@
+<settings>
+    <servers>
+        <server>
+            <id>bintray</id>
+            <username>${bintray.username}</username>
+            <password>${bintray.password}</password>
+        </server>
+    </servers>
+</settings>