bump go version to 1.18

[trevorwhitney]

Can we bump the go.mod version to 1.18? I can't seem to build v1.13.0 without out, and using older versions produces errors but fails to build

Using older versions of faillint against go code built on newer version of go (1.23 in this case) I see problems in the types library

> go/types.(*Checker).funcBody(0xc00220d000, 0x7e8298?, {0xc001ed29a4?, 0xc00133c280?}, 0xc000228640, 0xc0021a7b60, {0x0?, 0x0?})
       >         go/types/stmt.go:41 +0x331
       > go/types.(*Checker).funcDecl.func1()
       >       go/types/decl.go:852 +0x3a
       > go/types.(*Checker).processDelayed(0xc00220d000, 0x0)
       >      go/types/check.go:467 +0x162
       > go/types.(*Checker).checkFiles(0xc00220d000, {0xc0000a01e8, 0x1, 0x1})
       >   go/types/check.go:411 +0x1cc
       > go/types.(*Checker).Files(...)
       >   go/types/check.go:372
       > golang.org/x/tools/go/packages.(*loader).loadPackage(0xc0001921c0, 0xc001fe25c0)
       >        golang.org/x/tools@v0.1.12/go/packages/packages.go:1001 +0x76f
       > golang.org/x/tools/go/packages.(*loader).loadRecursive.func1()
       >         golang.org/x/tools@v0.1.12/go/packages/packages.go:838 +0x1a9
       > sync.(*Once).doSlow(0x0?, 0x0?)
       >         sync/once.go:74 +0xc2
       > sync.(*Once).Do(...)
       >    sync/once.go:65
       > golang.org/x/tools/go/packages.(*loader).loadRecursive(0x0?, 0x0?)
       >    golang.org/x/tools@v0.1.12/go/packages/packages.go:826 +0x4a
       > golang.org/x/tools/go/packages.(*loader).loadRecursive.func1.1(0x0?)
       >     golang.org/x/tools@v0.1.12/go/packages/packages.go:833 +0x26
       > created by golang.org/x/tools/go/packages.(*loader).loadRecursive.func1 in goroutine 3151
       >        golang.org/x/tools@v0.1.12/go/packages/packages.go:832 +0x94
       > make: *** [Makefile:343: lint] Error 2

When I try to switch to v1.13.0, I have trouble building it:

       > vendor/golang.org/x/tools/internal/event/keys/util.go:14:13: embedding interface element ~[]T requires go1.18 or later (-lang was set to go1.16; check go.mod)
       > vendor/golang.org/x/tools/internal/event/keys/util.go:14:21: embedding interface element ~string requires go1.18 or later (-lang was set to go1.16; check go.mod)
       > vendor/golang.org/x/tools/internal/event/keys/util.go:15:32: invalid argument: s (variable of type S constrained by ~[]T) for len
       > vendor/golang.org/x/tools/internal/event/keys/util.go:16:20: cannot range over s (variable of type S constrained by ~[]T): no core type
       > # golang.org/x/tools/internal/diff
       > vendor/golang.org/x/tools/internal/diff/ndiff.go:21:5: implicit function instantiation requires go1.18 or later (-lang was set to go1.16; check go.mod)
       > vendor/golang.org/x/tools/internal/diff/ndiff.go:35:5: implicit function instantiation requires go1.18 or later (-lang was set to go1.16; check go.mod)
       > vendor/golang.org/x/tools/internal/diff/ndiff.go:92:14: type parameter requires go1.18 or later (-lang was set to go1.16; check go.mod)
       > # golang.org/x/tools/internal/versions
       > vendor/golang.org/x/tools/internal/versions/types.go:15:16: predeclared any requires go1.18 or later (-lang was set to go1.16; check go.mod)

This PR fixes both problems, it builds and runs fine against my code.

[fatih]

SGTM. Thank you @trevorwhitney

[fatih]

Release: https://github.com/fatih/faillint/releases/tag/v1.14.0

[trevorwhitney]

wow, crazy fast on the merge and the release! thanks so much!