more-itertools versions available: 6.0.0

[dependencies]

There are new versions of more-itertools available from pypi.

6.0.0

Major chances:

:   -   Python 2.7 is no longer supported. The 5.0.0 release will be
        the last version targeting Python 2.7.
    -   All future releases will target the active versions of
        Python 3. As of 2019, those are Python 3.4 and above.
    -   The `six` library is no longer a dependency.
    -   The accumulate function is no longer part of this library.
        You may import a better version from the standard
        `itertools` module.

Changes to existing itertools:

:   -   The order of the parameters in grouper have changed to match
        the latest recipe in the itertools documentation. Use of the
        old order will be supported in this release, but emit a
        `DeprecationWarning`. The legacy behavior will be dropped in
        a future release. (thanks to jaraco)
    -   distinct\_permutations was improved (thanks to jferard - see
        also [permutations with unique
        values](https://stackoverflow.com/questions/6284396/permutations-with-unique-values)
        at StackOverflow.)
    -   An unused parameter was removed from substrings. (thanks to
        pylang)

Other changes:

:   -   The docs for unique\_everseen were improved. (thanks to
        jferard and MSeifert04)
    -   Several Python 2-isms were removed. (thanks to jaraco,
        MSeifert04, and hugovk)