stream_data: Convert orders from object to Map.
stream_data: Convert orders from object to Map.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulip.com>

synicalsyntax/zulip,synicalsyntax/zulip,timabbott/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,shubhamdhama/zulip,andersk/zulip,shubhamdhama/zulip,rht/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,andersk/zulip,showell/zulip,andersk/zulip,eeshangarg/zulip,synicalsyntax/zulip,timabbott/zulip,timabbott/zulip,brainwane/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,shubhamdhama/zulip,brainwane/zulip,eeshangarg/zulip,punchagan/zulip,showell/zulip,zulip/zulip,zulip/zulip,synicalsyntax/zulip,kou/zulip,zulip/zulip,brainwane/zulip,andersk/zulip,showell/zulip,timabbott/zulip,shubhamdhama/zulip,hackerkid/zulip,synicalsyntax/zulip,zulip/zulip,rht/zulip,punchagan/zulip,zulip/zulip,hackerkid/zulip,showell/zulip,showell/zulip,kou/zulip,punchagan/zulip,rht/zulip,punchagan/zulip,andersk/zulip,hackerkid/zulip,kou/zulip,hackerkid/zulip,timabbott/zulip,brainwane/zulip,punchagan/zulip,shubhamdhama/zulip,rht/zulip,andersk/zulip,eeshangarg/zulip,synicalsyntax/zulip,brainwane/zulip,timabbott/zulip,timabbott/zulip,showell/zulip,rht/zulip,eeshangarg/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,kou/zulip,shubhamdhama/zulip,shubhamdhama/zulip,brainwane/zulip,rht/zulip,brainwane/zulip,kou/zulip,showell/zulip,synicalsyntax/zulip