Merge pull request #279 from prometheus/sinjo-prepare-4-1-0

Prepare release 4.1.0

Author: Sinjo

CHANGELOG.md

@@ -2,8 +2,23 @@
 
 # Unreleased changes
 
+_None outstanding_
+
+# 4.1.0 / 2023-02-15
+
+_**Codename:** They finally made a point release_
+
 ## Small improvements
 
+- [#264](https://github.com/prometheus/client_ruby/pull/264) Add JRuby 9.3 to build matrix:
+    JRuby 9.3 was released, and added as an officially supported version
+- [#273](https://github.com/prometheus/client_ruby/pull/273) Add Ruby 3.2 to build matrix:
+    Ruby 3.2 was released, and added as an officially supported version
+- [#280](https://github.com/prometheus/client_ruby/pull/280) Optimize incrementing values
+    in DirectFileStore adapter:
+    There were some expensive method calls being made multiple times when they didn't need
+    to be for simple increments. This PR introduces a specialised implementation for that
+    case.
 - [#277](https://github.com/prometheus/client_ruby/pull/277) Allow use of `instance` and
     `job` labels:
     It's now possible to set the `instance` and `job` labels on metrics, where previously
@@ -19,6 +34,19 @@
     the scraped metric data to take precedence over the labels generated by the
     server.
 
+## Bug fixes
+
+- [#268](https://github.com/prometheus/client_ruby/pull/268) Use lowercase response headers
+    in Rack example:
+    Rack 3.0.0 started requiring this for compatibility with HTTP/2
+- [#271](https://github.com/prometheus/client_ruby/pull/271) Use lowercase for HTTP headers
+    in middleware:
+    Fixes the same issue from above in our middleware
+- [#270](https://github.com/prometheus/client_ruby/pull/270) Small compatibility fixes in
+    Rack example:
+    Apple have taken port 5000 for AirPlay, so we had to move away from it. Go has changed
+    how you install binaries, so we updated those instructions too.
+
 # 4.0.0 / 2022-03-27
 
 _**Codename:** The "barely a release" release_

lib/prometheus/client/version.rb

@@ -2,6 +2,6 @@
 
 module Prometheus
   module Client
-    VERSION = '4.0.0'
+    VERSION = '4.1.0'
   end
 end