feat: upgrade go version to 1.20

[dobet]

What this PR does:
upgrade go version from 1.18 to 1.20
Which issue(s) this PR fixes:

Fixes #715

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[dongzl]

please fix the README

[jjeffcaii]

Please upgrade the golangci-lint version in the Github action files and pre-commit configuration files.

[dobet]

Place update .github/workflows/*.yaml go version, or how to use my commit *.yaml to run action?

[codecov-commenter]

Codecov Report

Patch coverage: 57.14% and no project coverage change.

Comparison is base (a57148e) 37.28% compared to head (8072a1e) 37.28%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #716   +/-   ##
=======================================
  Coverage   37.28%   37.28%           
=======================================
  Files         230      230           
  Lines       24460    24460           
=======================================
  Hits         9120     9120           
  Misses      14296    14296           
  Partials     1044     1044           

Impacted Files	Coverage Δ
pkg/config/misc.go	0.00% <0.00%> (ø)
pkg/mysql/client.go	30.70% <0.00%> (ø)
pkg/mysql/utils.go	11.87% <0.00%> (ø)
pkg/runtime/calc/logic/logic.go	51.03% <ø> (ø)
pkg/runtime/function/cast_char.go	46.04% <100.00%> (ø)
pkg/selector/weight_random.go	77.41% <100.00%> (ø)
pkg/util/bytefmt/bytefmt.go	77.04% <100.00%> (ø)
pkg/util/charsetconv/charsetconv.go	50.00% <100.00%> (ø)

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[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication