Update dependencies to latest versions#4

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furstenheim wants to merge 7 commits intosehrope:masterfrom

furstenheim:master

Commits on Mar 22, 2016

Update dependencies to latest versions
furstenheim
committed

Commits on Jan 9, 2017

Improve dependencies
furstenheim
committed

Commits on Apr 3, 2017

Upgrade dependencies: pg 4 -> pg 6
Guli
committed

Commits on Apr 4, 2017

Commits on Apr 30, 2018