Release 0.2.1 - 2025/03/26

 * Fix runtime dependency to use with fluent-plugin-prometheus 2.2.0 or later.
   Only dependency was fixed.

Release 0.2.0 - 2025/03/21

 * CI: Bump actions/checkout from v3 to v4.
 * CI: Add Ruby 3.3/3.4 for CI.
 * Support prometheus-client 3.0 or later.
   - In the previous versions of fluent-plugin-prometheus was also restricted
     to prometheus-client 2.x if you use with it.

Release 0.1.1 - 2023/07/12

 * CI: Update supported version of Ruby.
   - Ruby 2.6 was dropped
 * CI: Add GitHub Action to watch by dependabot (weekly).
 * Stay on prometheus-client to 2.1.0.
 * Relax required version of fluent-plugin-prometheus to 2.1.0.

Release 0.1.0 - 2021/04/20

　* Upgrade fluent-plugin-prometheus to 2.0

