make limited_api: '3.12' conditional

Author: HugoMVale

meson.build

@@ -24,14 +24,24 @@ nanobind_dep = dependency('nanobind', static: true)
 odrpack_dep = dependency('odrpack95', static: true)
 
 # build extension module
-nanobind_ext = python.extension_module(
-  '__odrpack',
-  'src/odrpack/__odrpack.py.cpp',
-  dependencies : [python_dep, nanobind_dep, odrpack_dep],
-  install: true,
-  limited_api: '3.12',
-  subdir: 'odrpack'
-)
+if python.language_version().version_compare('>=3.12')
+  nanobind_ext = python.extension_module(
+    '__odrpack',
+    'src/odrpack/__odrpack.py.cpp',
+    dependencies : [python_dep, nanobind_dep, odrpack_dep],
+    install: true,
+    limited_api: '3.12',
+    subdir: 'odrpack'
+  )
+else
+  nanobind_ext = python.extension_module(
+    '__odrpack',
+    'src/odrpack/__odrpack.py.cpp',
+    dependencies : [python_dep, nanobind_dep, odrpack_dep],
+    install: true,
+    subdir: 'odrpack'
+  )
+endif
 
 python.install_sources(
   [