Use draft releases for Drone

This gives us a chance to review it and add notes.

.drone.yml

@@ -45,6 +45,7 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag
 
@@ -113,6 +114,7 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag
 
@@ -164,6 +166,7 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag
 
@@ -231,6 +234,7 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag
 
@@ -282,6 +286,7 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag
 
@@ -349,5 +354,6 @@ steps:
    api_key:
      from_secret: github_token
    files: release/*.tar.gz
+   draft: true
   when:
    event: tag