Fix type hints issues from review

1. Include py.typed in published package: add package_data in
   setup.py and include in MANIFEST.in (without this, PEP 561
   support was not actually working)

2. Widen date callback type from Callable[[], str] to
   Callable[..., str | datetime | float] to match existing
   behavior (callbacks can return datetime/float, not just str)

3. Fix SMTPResponse annotations: esmtp_opts and rcpt_options are
   lists (not str), and rename refused_recipient to
   refused_recipients to match actual usage in client.py

Author: lavr

MANIFEST.in

@@ -1 +1,2 @@
 include README.rst LICENSE requirements.txt
+include emails/py.typed

emails/backend/response.py

@@ -37,13 +37,13 @@ def __init__(self, exception: Exception | None = None, backend: Any = None) -> N
 
         self.responses: list[list] = []
 
-        self.esmtp_opts: str | None = None
-        self.rcpt_options: str | None = None
+        self.esmtp_opts: list[str] | None = None
+        self.rcpt_options: list[str] | None = None
 
         self.status_code: int | None = None
         self.status_text: str | None = None
         self.last_command: str | None = None
-        self.refused_recipient: dict[str, tuple[int, str]] = {}
+        self.refused_recipients: dict[str, tuple[int, bytes]] = {}
 
     def set_status(self, command: str, code: int, text: str, **kwargs: Any) -> None:
         self.responses.append([command, code, text, kwargs])

emails/message.py

@@ -39,7 +39,7 @@ class BaseMessage:
     def __init__(self,
                  charset: str | None = None,
                  message_id: str | MessageID | bool | None = None,
-                 date: str | datetime | float | bool | Callable[[], str] | None = None,
+                 date: str | datetime | float | bool | Callable[..., str | datetime | float] | None = None,
                  subject: str | None = None,
                  mail_from: _Address = None,
                  mail_to: _AddressList = None,
@@ -158,7 +158,7 @@ def get_subject(self) -> str | None:
     def render(self, **kwargs: Any) -> None:
         self.render_data = kwargs
 
-    def set_date(self, value: str | datetime | float | bool | Callable[[], str] | None) -> None:
+    def set_date(self, value: str | datetime | float | bool | Callable[..., str | datetime | float] | None) -> None:
         self._date = value
 
     def get_date(self) -> str | None:

setup.py

@@ -126,6 +126,7 @@ def find_version(*file_paths):
               'emails.packages',
               'emails.packages.dkim'
              ],
+    package_data={'emails': ['py.typed']},
     scripts=['scripts/make_rfc822.py'],
     python_requires='>=3.10',
     install_requires=['python-dateutil'],