Modernize Go and actions version

[codecov[bot]]

Codecov Report

Merging #476 (0563860) into master (b07f92f) will decrease coverage by 0.01%. The diff coverage is 100.00%.

:exclamation: Current head 0563860 differs from pull request most recent head 8ab44c4. Consider uploading reports for the commit 8ab44c4 to get more accurate results

@@            Coverage Diff             @@
##           master     #476      +/-   ##
==========================================
- Coverage   58.10%   58.10%   -0.01%     
==========================================
  Files          53       53              
  Lines       10673    10672       -1     
==========================================
- Hits         6202     6201       -1     
  Misses       4037     4037              
  Partials      434      434              

Impacted Files	Coverage Δ
file/buffer.go	88.86% <ø> (ø)
file/observable_editable_buffer.go	71.28% <ø> (ø)
regexp/regexp.go	9.82% <ø> (ø)
frame/ptofchar.go	80.55% <100.00%> (-0.27%)	:arrow_down:

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