Merge branch 'mc/1.13' of https://github.com/BlueMap-Minecraft/BlueMap into mc/1.13

Author: TBlueF

.github/workflows/gradle.yml

@@ -15,3 +15,7 @@ jobs:
       run: ./gradlew test
     - name: Build with Gradle
       run: ./gradlew build
+    - uses: actions/upload-artifact@v2-preview
+      with:
+        name: artifact
+        path: build/release/*