core(deps): Use Go 1.18

[yitsushi]

Local development notes:

• If you are using go 1.18 and all your installed binaries (golint for example) was compiled with 1.18 you have nothing to do
• If you are using go 1.18, but some of your tools were installed/compiled with 1.17, you have to re-compile them
• If you are using go 1.18, some of your tools were installed/compiled with 1.17, but you updated them after you moved to 1.18, you have nothing to do
• if you are still using go 1.17, you have to update go version to 1.18 and re-compile your binaries

Closes #763

[yiannistri]

LGTM 👍 cc @foot

[yiannistri]

👌

[foot]

Wicked! Maybe update CONTRIB.md too.

Any other transitional notes? I remember going to 1.17 (?) we had to go mod tidy -compat or something..

[foot]

Seems a bit faster building the golang docker images ✨

[yitsushi]

Any other transitional notes? I remember going to 1.17 (?) we had to go mod tidy -compat or something..

I don't think, I just run go mod tidy once in directories with go.mod file. Running (now) go mod tidy -compat=1.18 did not change mod or sum files.

Maybe update CONTRIB.md too.

Updated.