Update to 3.12.1

Author: zachriggle

CHANGELOG.md

@@ -11,7 +11,8 @@ The table below shows which release corresponds to each branch, and what date th
 | ---------------- | -------- | ---------------------- |
 | [3.14.0](#3130)  | `dev`    | Jun 12, 2018 (planned)
 | [3.13.0](#3130)  | `beta`   | Mar 31, 2018 (planned)
-| [3.12.0](#3120)  | `stable` | Feb 22, 2018
+| [3.12.1](#3121)  | `stable` | Sept 17, 2018
+| [3.12.0](#3120)  |          | Feb 22, 2018
 | [3.11.0](#3110)  |          | Jan 3, 2018
 | [3.10.0](#3100)  |          | Oct 25, 2017
 | [3.9.2](#392)    |          | Oct 5, 2017

README.md

@@ -2,7 +2,7 @@
 ![pwntools logo](https://github.com/Gallopsled/pwntools/blob/stable/docs/source/logo.png?raw=true)
 
 [![Docs](https://readthedocs.org/projects/pwntools/badge/?version=stable)](https://docs.pwntools.com/)
-[![PyPI](https://img.shields.io/badge/pypi-v3.12.0-green.svg?style=flat)](https://pypi.python.org/pypi/pwntools/)
+[![PyPI](https://img.shields.io/badge/pypi-v3.12.1-green.svg?style=flat)](https://pypi.python.org/pypi/pwntools/)
 [![Travis](https://travis-ci.org/Gallopsled/pwntools.svg)](https://travis-ci.org/Gallopsled/pwntools)
 [![Coveralls](https://img.shields.io/coveralls/Gallopsled/pwntools/dev.svg)](https://coveralls.io/github/Gallopsled/pwntools?branch=dev)
 [![Twitter](https://img.shields.io/badge/twitter-pwntools-4099FF.svg?style=flat)](https://twitter.com/pwntools)