Update package:sse dep

Change-Id: I1768c275b652ce7c86e001221c8fc849087dd034
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/183701
Reviewed-by: Nate Bosch <nbosch@google.com>
Auto-Submit: Gary Roumanis <grouma@google.com>
Commit-Queue: Gary Roumanis <grouma@google.com>
diff --git a/DEPS b/DEPS
index e112f19..301e6de 100644
--- a/DEPS
+++ b/DEPS
@@ -147,7 +147,7 @@
   "source_maps-0.9.4_rev": "38524",
   "source_maps_rev": "53eb92ccfe6e64924054f83038a534b959b12b3e",
   "source_span_rev": "aecb614eac3caa333658493b31a32b4e904cb0a4",
-  "sse_tag": "e93a783755b9b048b9156f795461d17a5ece9ce8",
+  "sse_tag": "17b52bbdeee53fc54e5bdf9b80934460a9d63ba6",
   "stack_trace_tag": "6788afc61875079b71b3d1c3e65aeaa6a25cbc2f",
   "stagehand_rev": "e64ac90cac508981011299c4ceb819149e71f1bd",
   "stream_channel_tag": "d7251e61253ec389ee6e045ee1042311bced8f1d",