docs: smtp_port is now respected by backlash

Support for a custom smtp_port was recently added to backlash, so bump
backlash and update the documentation to reflect that.

docs/usage/email.rst

@@ -85,10 +85,6 b' contain only an email address, like `kal'
 a name and an address in the following format: `Kallithea Errors
 <[e-mail]>`.
 
-*Note:* The WebError_ package does not respect ``smtp_port`` and assumes the
-standard SMTP port (25). If you have a remote SMTP server with a different port,
-you could set up a local forwarding SMTP server on port 25.
-
 
 References
 ----------

setup.py

@@ -39,7 +39,7 b' requirements = ['
     "GearBox<1",
     "waitress>=0.8.8,<1.0",
     "webob>=1.7,<2",
-    "backlash >= 0.1.1, < 1.0.0",
+    "backlash >= 0.1.2, < 1.0.0",
     "TurboGears2 >= 2.3.10, < 3.0.0",
     "tgext.routes >= 0.2.0, < 1.0.0",
     "Beaker>=1.7.0,<2",