CI: Test with PyPy 3.11 and non-bundle Lua 5.4 (replacing 5.2) (GH-283)

Author: dbohdan

.github/workflows/ci.yml

@@ -25,10 +25,11 @@ jobs:
           - "pypy-3.8"
           - "pypy-3.9"
           - "pypy-3.10"
+          - "pypy-3.11"
         lua-version:
           - "bundle"
+          - "lua5.4"
           - "lua5.3"
-          - "lua5.2"
           - "luajit-5.1"
 
         exclude: