- Drop support for 3.4.
- Add support for 3.8

Co-Authored-By: Tres Seaver <tseaver@palladion.com>

Added pypy and pypy3 tests

Add tests for zodb4.

Garden changelog since 2.3.1.

Annual housecleaning

Fix PendingDeprecationWarning about cgi.parse_qsl

- Do not use smart quotes

- Perpetual year in copyright
- Current version
- Clean up imports and calls

I was running py.test based tests on a project which uses zodburi and
got many warnings:

	.../python2.7/site-packages/zodburi/resolvers.py:86: PendingDeprecationWarning: cgi.parse_qsl is deprecated, use urlparse.parse_qsl instead
	  kw = dict(parse_qsl(query))

Since for Python2 cig.parse_qsl was migrated to urlparse.parse_qsl in 2008:

	https://github.com/python/cpython/commit/c585df9476

it is safe to change to urlparse.parse_qsl unconditionally.

Fix typo in Trove classifiers.

zeo: Fix parsing URI with IPv6 address

The code was crashing this way:

---- 8< ----
======================================================================
ERROR: test_call_ipv6 (zodburi.tests.test_resolvers.TestClientStorageURIResolver)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/home/kirr/src/wendelin/z/zodburi/zodburi/tests/test_resolvers.py", line 265, in test_call_ipv6
    factory, dbkw = resolver('zeo://[::1]:9090?debug=true')
  File "/home/kirr/src/wendelin/z/zodburi/zodburi/resolvers.py", line 141, in __call__
    host, port = netloc.split(':')
ValueError: too many values to unpack

======================================================================
ERROR: test_call_ipv6_no_port (zodburi.tests.test_resolvers.TestClientStorageURIResolver)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/kirr/src/wendelin/venv/z-dev/local/lib/python2.7/site-packages/mock/mock.py", line 1305, in patched
    return func(*args, **keywargs)
  File "/home/kirr/src/wendelin/z/zodburi/zodburi/tests/test_resolvers.py", line 258, in test_call_ipv6_no_port
    factory, dbkw = resolver('zeo://[::1]?debug=true')
  File "/home/kirr/src/wendelin/z/zodburi/zodburi/resolvers.py", line 141, in __call__
    host, port = netloc.split(':')
ValueError: too many values to unpack
---- 8< ----

Fix it by leveraging the fact that urlparse.urlsplit return() tuple-like object
with additional .hostname and .port attributes which already parse IPv6 correctly:

In [2]: u = urlsplit('http://[::1]:5553')

In [3]: u
Out[3]: SplitResult(scheme='http', netloc='[::1]:5553', path='', query='', fragment='')

In [4]: u.netloc
Out[4]: '[::1]:5553'

In [5]: u.hostname
Out[5]: '::1'

In [6]: u.port
Out[6]: 5553

In [7]: u = urlsplit('http://[::1]')

In [8]: u.hostname
Out[8]: '::1'

In [9]: u.port

In [10]: repr(u.port)
Out[10]: 'None'

setup: Fix thinko for test_require

It is test_require who should list all packages needed for testing, but
because of thinko in 3833be7e (Convert db resolvers to storage
resolvers.) it was the other way.

This resulted in zodburi install always pulling in mock. Fix it.