Update e2e-test go version to 1.16

[yJunS]

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[linuxsuren-bot]

Welcome @yJunS! It looks like this is your first PR to jenkins-zh/jenkins-cli 🎉

[codecov-commenter]

Codecov Report

Merging #599 (5840e04) into master (c1846ac) will not change coverage.
The diff coverage is n/a.

❗ Current head 5840e04 differs from pull request most recent head c40b865. Consider uploading reports for the commit c40b865 to get more accurate results

@@           Coverage Diff           @@
##           master     #599   +/-   ##
=======================================
  Coverage   38.46%   38.46%           
=======================================
  Files          13       13           
  Lines         286      286           
=======================================
  Hits          110      110           
  Misses        164      164           
  Partials       12       12           

Flag	Coverage Δ
unittests	38.46% <ø> (ø)

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[LinuxSuRen]

If we want to upgrade the version, then we should upgrade it from all places instead of just the e2e tests.

[yJunS]

If we want to upgrade the version, then we should upgrade it from all places instead of just the e2e tests.

OK. I already updated

[LinuxSuRen]

and here

jenkins-cli/go.mod

Line 3 in c1846ac

go 1.14

[yJunS]

and here

jenkins-cli/go.mod

Line 3 in c1846ac

go 1.14

Already updated.

[LinuxSuRen]

/lgtm