Fix a crash on mypy master branch (typeddjango#2670)

* Fix a crash on mypy master branch

In python/mypy#18818 the `msg` argument to
`analyze_member_access()` was removed.

* Switch to using a version-based check

Author: ngnpope

mypy_django_plugin/transformers/functional.py

@@ -1,12 +1,17 @@
+from typing import Any
+
 from mypy.checkmember import analyze_member_access
 from mypy.errorcodes import ATTR_DEFINED
 from mypy.nodes import CallExpr, MemberExpr
 from mypy.plugin import AttributeContext
 from mypy.types import AnyType, Instance, TypeOfAny
 from mypy.types import Type as MypyType
+from mypy.version import __version__ as mypy_version
 
 from mypy_django_plugin.lib import helpers
 
+mypy_version_info = tuple(map(int, mypy_version.partition("+")[0].split(".")))
+
 
 def resolve_str_promise_attribute(ctx: AttributeContext) -> MypyType:
     if isinstance(ctx.context, MemberExpr):
@@ -20,6 +25,12 @@ def resolve_str_promise_attribute(ctx: AttributeContext) -> MypyType:
     str_info = helpers.lookup_fully_qualified_typeinfo(helpers.get_typechecker_api(ctx), "builtins.str")
     assert str_info is not None
     str_type = Instance(str_info, [])
+
+    # TODO: [mypy 1.16+] Remove this workaround for passing `msg` to `analyze_member_access()`.
+    extra: dict[str, Any] = {}
+    if mypy_version_info < (1, 16):
+        extra["msg"] = ctx.api.msg
+
     return analyze_member_access(
         method_name,
         str_type,
@@ -28,7 +39,7 @@ def resolve_str_promise_attribute(ctx: AttributeContext) -> MypyType:
         is_super=False,
         # operators are already handled with magic methods defined in the stubs for _StrPromise
         is_operator=False,
-        msg=ctx.api.msg,
         original_type=ctx.type,
         chk=helpers.get_typechecker_api(ctx),
+        **extra,
     )