upgrade gotest.tools to v3.4.0 to drop pkg/errors dependency

[pacoxu]

Signed-off-by: Paco Xu paco.xu@daocloud.io

See more in kubernetes/kubernetes#114942

[pacoxu]

/cc @thaJeztah

[thaJeztah]

LGTM

we can probably get rid of the gotest.tools package altogether; it looks like it's only used for basic assertions; I'll have a look at a follow-up 👍

[thaJeztah]

@dims PTAL

[thaJeztah]

LOL, looks like I already had a branch doing so, but I see the last commit was "WIP";

git checkout -b remove_gotest_tools
fatal: a branch named 'remove_gotest_tools' already exists

git checkout remove_gotest_tools
git log --pretty=format:"%h%x09%an%x09%ad%x09%s"
80e9796 Sebastiaan van Stijn    Thu Mar 12 13:41:45 2020 +0100  WIP remove gotest.tools dependency
c3ff14e Sebastiaan van Stijn    Thu Mar 12 12:28:01 2020 +0100  remove unneeded _windows.go file
a43b11e Sebastiaan van Stijn    Thu Mar 12 12:14:19 2020 +0100  cleanup "ignore" files
860c90c Sebastiaan van Stijn    Thu Mar 12 12:11:56 2020 +0100  Remove testutils package

[thaJeztah]

I opened #29 as alternative

[dims]

@pacoxu let's use the other one - #29 as it drops 2 packages completely

[pacoxu]

close in favor of #29