Add it to compat/__init__.py

Author: mroeschke

pandas/compat/__init__.py

@@ -35,6 +35,7 @@
     pa_version_under17p0,
     pa_version_under18p0,
     pa_version_under19p0,
+    pa_version_under20p0,
 )
 
 if TYPE_CHECKING:
@@ -168,4 +169,5 @@ def is_ci_environment() -> bool:
     "pa_version_under17p0",
     "pa_version_under18p0",
     "pa_version_under19p0",
+    "pa_version_under20p0",
 ]