Add s3 upload support in .goreleaser.yml via `blob` configuration

- used blob configuration instead of deprecated s3 one. this requires
adding a AWS_DEFAULT_REGION env var to the drone step (toghether with
the IAM credentials), because this
property is missing in the blob config

.drone.yml

@@ -61,6 +61,11 @@ steps:
   environment:
     GITHUB_TOKEN:
       from_secret: github_token
+    AWS_ACCESS_KEY_ID:
+      from_secret: downloads_drone_io_aws_access_key_id
+    AWS_SECRET_ACCESS_KEY:
+      from_secret: downloads_drone_io_aws_secret_access_key
+    AWS_DEFAULT_REGION: 'us-east-1'
   commands:
     - goreleaser
 

.goreleaser.yml

@@ -92,3 +92,11 @@ archives:
     files:
       - README.md
       - LICENSE.txt
+
+blob:
+  -
+    provider: s3
+    bucket: arduino-downloads-prod-beagle
+    ids:
+      - arduino_cli
+    folder: "{{ .ProjectName }}"
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