Bump version key to 0.8.4

Author: simon-mo

python/ray/__init__.py

@@ -93,7 +93,7 @@
 
 # Replaced with the current commit when building the wheels.
 __commit__ = "{{RAY_COMMIT_SHA}}"
-__version__ = "0.9.0.dev0"
+__version__ = "0.8.4"
 
 __all__ = [
     "jobs",

src/ray/raylet/main.cc

@@ -80,7 +80,7 @@ int main(int argc, char *argv[]) {
   // Initialize stats.
   const ray::stats::TagsType global_tags = {
       {ray::stats::JobNameKey, "raylet"},
-      {ray::stats::VersionKey, "0.9.0.dev0"},
+      {ray::stats::VersionKey, "0.8.4"},
       {ray::stats::NodeAddressKey, node_ip_address}};
   ray::stats::Init(stat_address, global_tags, disable_stats, enable_stdout_exporter);