Test with latest PyPy (#290)

.github/workflows/check.yml

diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index b3576fe..f2048e9 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -20,7 +20,7 @@
       fail-fast: false
       matrix:
         py:
-          - "pypy3.9" # ahead to start it earlier because takes longer
+          - "pypy3.10" # ahead to start it earlier because takes longer
           - "3.13"
           - "3.12"
           - "3.11"

pyproject.toml

diff --git a/pyproject.toml b/pyproject.toml
index 264619a..f518d95 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -99,7 +99,7 @@
     "3.10",
     "3.9",
     "3.8",
-    "pypy3.9",
+    "pypy3.10",
   ] },
 ]
 features = [