Go 1.18

[lukasmalkmus]

This PR introduces Go 1.18 support. Since it isn't used as a package anywhere, this is fine.

We also actively profit from Generics to drop some helper methods that vanished.

Needs golangci/golangci-lint#2438 to pass CI.

[codecov]

Codecov Report

Merging #109 (65b70cc) into main (26b91ef) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #109   +/-   ##
=======================================
  Coverage   14.42%   14.42%           
=======================================
  Files          10       10           
  Lines         520      520           
=======================================
  Hits           75       75           
  Misses        429      429           
  Partials       16       16           

Impacted Files	Coverage Δ
pkg/terminal/epipe_other.go	0.00% <ø> (ø)

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[github-actions]

This PR/issue depends on:

• go1.18 support golangci/golangci-lint#2438
  By Dependent Issues (🤖). Happy coding!