executors: make go executor with with 1.16+

[quantum5]

No description provided.

[Xyene]

LGTM

[codecov-commenter]

Codecov Report

Merging #916 (870fcc4) into master (8d0b5c7) will not change coverage.
The diff coverage is n/a.

❗ Current head 870fcc4 differs from pull request most recent head 6719d03. Consider uploading reports for the commit 6719d03 to get more accurate results

@@           Coverage Diff           @@
##           master     #916   +/-   ##
=======================================
  Coverage   86.22%   86.22%           
=======================================
  Files         138      138           
  Lines        4631     4631           
=======================================
  Hits         3993     3993           
  Misses        638      638           

Impacted Files	Coverage Δ
dmoj/executors/GO.py	100.00% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8d0b5c7...6719d03. Read the comment docs.