Set rust-version at the workspace level

Author: djc

Cargo.toml

@@ -13,6 +13,7 @@ members = [
 
 [workspace.package]
 edition = "2021"
+rust-version = "1.71.1" # metrics-observer has a higher MSRV
 license = "MIT"
 repository = "https://github.com/metrics-rs/metrics"
 homepage = "https://github.com/metrics-rs/metrics"

metrics-benchmark/Cargo.toml

@@ -3,7 +3,7 @@ name = "metrics-benchmark"
 version = "0.1.1-alpha.5"
 authors = ["Toby Lawrence <toby@nuclearfurnace.com>"]
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 publish = false
 
 [dependencies]

metrics-exporter-dogstatsd/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics-exporter-dogstatsd"
 version = "0.9.6"
 edition = { workspace = true}
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "A metrics-compatible exporter for sending metrics to the Datadog Agent."
 license = { workspace = true }

metrics-exporter-prometheus/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics-exporter-prometheus"
 version = "0.17.2"
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "A metrics-compatible exporter for sending metrics to Prometheus."
 license = { workspace = true }

metrics-exporter-tcp/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics-exporter-tcp"
 version = "0.11.1"
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "A metrics-compatible exporter that outputs metrics to clients over TCP."
 license = { workspace = true }

metrics-tracing-context/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics-tracing-context"
 version = "0.18.1"
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "A crate to use tracing context as metrics labels."
 license = { workspace = true }

metrics-util/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics-util"
 version = "0.20.0"
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "Helper types/functions used by the metrics ecosystem."
 license = { workspace = true }

metrics/Cargo.toml

@@ -2,7 +2,7 @@
 name = "metrics"
 version = "0.24.2"
 edition = "2018"
-rust-version = "1.71.1"
+rust-version = { workspace = true }
 
 description = "A lightweight metrics facade."
 license = { workspace = true }