go: upgrade to Go 1.26 and modernize

.github/workflows/pr-auditor.yml

@@ -14,7 +14,7 @@ jobs:
           repository: 'sourcegraph/devx-service'
           token: ${{ secrets.PR_AUDITOR_TOKEN }}
       - uses: actions/setup-go@v4
-        with: { go-version: '1.22' }
+        with: { go-version: '1.26.4' }
 
       - run: 'go run ./cmd/pr-auditor'
         env:

dumper/dumper.go

@@ -183,7 +183,7 @@ func (dmpr *Dumper) nextID() int {
 	return dmpr.id
 }
 
-func (dmpr *Dumper) emit(v interface{}) error {
+func (dmpr *Dumper) emit(v any) error {
 	return dmpr.encoder.Encode(v)
 }
 

go.mod

@@ -1,6 +1,6 @@
 module lsif-jsonnet
 
-go 1.13
+go 1.26.4
 
 require (
 	github.com/antlr/antlr4 v0.0.0-20190922154701-7982187134a6

refs/listener.go

@@ -2,7 +2,7 @@ package refs
 
 import (
 	"fmt"
-	"io/ioutil"
+	"os"
 
 	"github.com/antlr/antlr4/runtime/Go/antlr"
 	"lsif-jsonnet/parser"
@@ -21,7 +21,7 @@ type Listener struct {
 }
 
 func ParseFile(path string, pathResolver *PathResolver) (*Listener, error) {
-	data, err := ioutil.ReadFile(path)
+	data, err := os.ReadFile(path)
 	if err != nil {
 		return nil, err
 	}