[requires.io] dependency update on master branch (#1402)
[requires.io] dependency update on master branch (#1402)

* Upgrade alembic to 0.8.7
* Upgrade botocore to 1.4.39
* Upgrade setuptools to 25.1.0

alex/warehouse,pypa/warehouse,alex/warehouse,dstufft/warehouse,pypa/warehouse,alex/warehouse,alex/warehouse,alex/warehouse,dstufft/warehouse,dstufft/warehouse,pypa/warehouse,dstufft/warehouse,pypa/warehouse