Faddat/go 19

[faddat]

Go 1.19 contains some cryptographic tweaks and it seems to be a good idea to be early adopters.

https://tip.golang.org/doc/go1.19

Changes:

• golangci-lint with reasonable exclusions to avoid rewriting scrt
• use io and os instead of io/ioutil so that we don't trigger go 1.19's anger
• basic linting changes
• fix GetTXConfig
• Now we can incrementally adopt tighter linting

[faddat]

I think that the remaining error might be a build system error.

Not certain.

[faddat]

It isn't the build system. I used the same temp directory for all the things.

[faddat]

good to go :)

[assafmo]

Thank you! This looks good, however to prevent future headache when merging cosmwasm-v1 into master, I'm closing this PR and I've cherry-picked the commits (a9a2e83, 5a8676f, c157695 & c94929e) into cosmwasm-v1.