feat: go1.20 and golangci-lint v1.55.2

[mikeee]

Brings the package up to go1.20

golangci-lint has been bumped from v1.54.2 to v1.55.2

[codecov[bot]]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (959de75) 69.83% compared to head (335bcd9) 70.08%.

Files	Patch %	Lines
client/metadata.go	18.51%	18 Missing and 4 partials :warning:
service/grpc/topic.go	80.95%	3 Missing and 1 partial :warning:
service/grpc/invoke.go	66.66%	2 Missing and 1 partial :warning:
client/crypto.go	33.33%	1 Missing and 1 partial :warning:
client/actor.go	50.00%	1 Missing :warning:
client/configuration.go	90.90%	0 Missing and 1 partial :warning:
client/pubsub.go	88.88%	1 Missing :warning:
service/grpc/binding.go	80.00%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #480 +/- ## ========================================== + Coverage 69.83% 70.08% +0.24% ========================================== Files 35 35 Lines 2841 2841 ========================================== + Hits 1984 1991 +7 + Misses 743 738 -5 + Partials 114 112 -2 ```

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