Add an integration with schemars to rpcperf-dataspec (iopsystems#147)

* Update metriken to v0.5

* Add a schemars feature to rpcperf-dataspec

This adds derives for schemars::JsonSchema on any type which derives
Serialize or Deserialize. These are all locked behind a "schemars"
feature.

Cargo.toml

@@ -16,7 +16,7 @@ repository = { workspace = true }
 license = { workspace = true }
 
 [workspace.dependencies]
-histogram = { version = "0.8.3", features = ["serde-serialize"] }
+histogram = { version = "0.9.0", features = ["serde"] }
 serde = { version = "1.0.185", features = ["derive"] }
 
 [dependencies]
@@ -34,7 +34,7 @@ histogram = { workspace = true }
 http-body-util = "0.1.0-rc.3"
 humantime = "2.1.0"
 hyper = { version = "1.0.0-rc.4", features = ["http1", "http2", "client"]}
-metriken = "0.3.3"
+metriken = "0.5.1"
 mio = "0.8.8"
 momento = "0.32.1"
 pelikan-net = "0.1.0"
@@ -63,6 +63,7 @@ zipf = "7.0.1"
 
 [workspace]
 members = [
+    ".",
     "lib/dataspec",
 ]