build(deps): Bump simplejson

[evanpurkhiser]

We're bumping so that simplejson is on a version that is tested against 3.6, our target py3 version.

The migration from 3.8.2 -> 3.11 is trivial, here is a summarized changelog, not including meta changes in the package:

Version 3.11.0 released 2017-06-18

• Call PyObject_IsTrue() only once for the strict argument of scanner Call PyObject_IsTrue() only once for the strict argument of scanner. simplejson/simplejson#170
• Fix a crash with unencodable encoding in the encoder Fix a crash wish unencodable encoding in the encoder. simplejson/simplejson#171
• Remove remnants of Python 2.4 support Remove remnants of Python 2.4 support. simplejson/simplejson#168
• Fix argument checking errors in _speedups.c Fix argument checking errors in _speedups.c. simplejson/simplejson#169
• Remove the __init__ methods in extension classes Remove the __init__ methods in extension classes. simplejson/simplejson#166
• Add Python 3.6 to testing matrix and PyPI metadata Update Python versions simplejson/simplejson#153 Python 3.6 is out simplejson/simplejson#152

Version 3.10.0 released 2016-10-28

• Add RawJSON class to allow a faster path for already encoded JSON. Add support for preprocessed JSON strings (with optimizations) in encoder simplejson/simplejson#143

Version 3.9.0 released 2016-10-21

• Workaround for bad behavior in string subclasses simplejson.dumps(markupsafe.Markup('string with "quotes"')) breaks without C extensions simplejson/simplejson#144
• Fix warnings flagged by -3 Fix problems identified by -3 flag when running in Python 2.7 simplejson/simplejson#146

[wedamija]

LGTM, we should bump this in getsentry at the same time