tag: fix build

On tip (the Go 1.22 code freeze), Go reports that `compareTag` has the
wrong method signature:

```
type func(a Tag, b Tag) int of tagCompare does not match inferred type func(a Tag, b Tag) bool for func(a E, b E) bool
```

Fix this by using the correct method signature.

go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/segmentio/objconv v1.0.1
 	github.com/segmentio/vpcinfo v0.1.10
 	github.com/stretchr/testify v1.8.4
-	golang.org/x/exp v0.0.0-20230905200255-921286631fa9
+	golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb
 	golang.org/x/sync v0.3.0
 )
 

go.sum

@@ -15,8 +15,6 @@ github.com/mdlayher/taskstats v0.0.0-20190313225729-7cbba52ee072 h1:7YEPiUVGht4Z
 github.com/mdlayher/taskstats v0.0.0-20190313225729-7cbba52ee072/go.mod h1:sGdS7A6CAETR53zkdjGkgoFlh1vSm7MtX+i8XfEsTMA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e h1:uO75wNGioszjmIzcY/tvdDYKRLVvzggtAmmJkn9j4GQ=
-github.com/segmentio/fasthash v0.0.0-20180216231524-a72b379d632e/go.mod h1:tm/wZFQ8e24NYaBGIlnO2WGCAi67re4HHuOm0sftE/M=
 github.com/segmentio/fasthash v1.0.3 h1:EI9+KE1EwvMLBWwjpRDc+fEM+prwxDYbslddQGtrmhM=
 github.com/segmentio/fasthash v1.0.3/go.mod h1:waKX8l2N8yckOgmSsXJi7x1ZfdKZ4x7KRMzBtS3oedY=
 github.com/segmentio/objconv v1.0.1 h1:QjfLzwriJj40JibCV3MGSEiAoXixbp4ybhwfTB8RXOM=
@@ -26,8 +24,8 @@ github.com/segmentio/vpcinfo v0.1.10/go.mod h1:KEIWiWRE/KLh90mOzOY0QkFWT7ObUYLp9
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-golang.org/x/exp v0.0.0-20230905200255-921286631fa9 h1:GoHiUyI/Tp2nVkLI2mCxVkOjsbSXD66ic0XW0js0R9g=
-golang.org/x/exp v0.0.0-20230905200255-921286631fa9/go.mod h1:S2oDrQGGwySpoQPVqRShND87VCbxmc6bL1Yd2oYrm6k=
+golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb h1:c0vyKkb6yr3KR7jEfJaOSv4lG7xPkbN6r52aJz1d8a8=
+golang.org/x/exp v0.0.0-20231206192017-f3f8817b8deb/go.mod h1:iRJReGqOEeBhDZGkGbynYwcHlctCvnjTYIamk7uXpHI=
 golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190313220215-9f648a60d977/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.7.0 h1:rJrUqqhjsgNp7KqAIc25s9pZnjU7TUcSY7HcVZjdn1g=

tag.go

@@ -51,15 +51,9 @@ func SortTags(tags []Tag) []Tag {
 	return deduplicateTags(tags)
 }
 
-func tagCompare(a, b Tag) int {
-	switch {
-	case a.Name < b.Name:
-		return -1
-	case a.Name > b.Name:
-		return +1
-	}
-
-	return 0
+// reports whether a is less than b
+func tagCompare(a, b Tag) bool {
+	return a.Name < b.Name
 }
 
 func deduplicateTags(tags []Tag) []Tag {

tag_test.go

@@ -190,7 +190,7 @@ func BenchmarkTagsOrder(b *testing.B) {
 
 func tagIsLessByIndex(tags []Tag) func(int, int) bool {
 	return func(i, j int) bool {
-		return tagCompare(tags[i], tags[j]) < 0
+		return tagCompare(tags[i], tags[j]) == false
 	}
 }