Drop support for Python 2.6?

[cclauss]

https://travis-ci.org/crsmithdev/arrow/jobs/212040401#L116 says: DEPRECATION: Python 2.6 is no longer supported by the Python core team, please upgrade your Python. A future version of pip will drop support for Python 2.6

Python 2.6 End of Life was in 2013... https://docs.python.org/devguide/index.html#branchstatus

Should arrow drop support for Python 2.6?

[hugovk]

Drop it.

• Unsupported since 2013-10-29
• https://snarky.ca/stop-using-python-2-6/
• http://www.curiousefficiency.org/posts/2015/04/stop-supporting-python26.html
• http://www.python3statement.org
• Current pip 9 deprecates Python 2.6 support, pip 10 won't support it (Drop support for Python 2.6? pypa/pip#3955)
• Not much PyPI traffic (June 2016) Deprecate/Drop Support for Python 3.3? pypa/pip#3796

[hugovk]

Here's the pip installs for arrow from PyPI for the last month:

$ pypinfo --percent --pip arrow pyversion
python_version percent download_count
-------------- ------- --------------
2.7              59.8%        880,090
3.6              35.4%        520,727
3.4               2.5%         36,115
3.5               2.2%         32,627
3.3               0.0%            616
2.6               0.0%            534
3.7               0.0%            386
3.2               0.0%              7
None              0.0%              1

How about dropping Python 3.3 as well? It went EOL last month.