Update to Go 1.18

[FileGo]

Updated things to Go 1.18. Also upgraded the Alpine Linux version in Dockerfile, as 3.16 has been released recently.

Lint action fails, but this has been addressed in #536, so should be fine once it's merged.

[ThinkChaos]

I think you need to run go mod tidy to update the go.mod and go.sum files, 1.18 now splits direct and indirect dependencies in multiple require blocks.

[codecov]

Codecov Report

Merging #540 (87da9d8) into development (8d0bd8e) will increase coverage by 1.19%.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           development     #540      +/-   ##
===============================================
+ Coverage        93.73%   94.92%   +1.19%     
===============================================
  Files               36       36              
  Lines             3112     3312     +200     
===============================================
+ Hits              2917     3144     +227     
+ Misses             145      116      -29     
- Partials            50       52       +2     

Impacted Files	Coverage Δ
config/config.go	95.91% <0.00%> (-2.23%)	⬇️
server/server.go	90.33% <0.00%> (+4.51%)	⬆️
redis/redis.go	90.78% <0.00%> (+24.34%)	⬆️

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[0xERR0R]

Thanks!