all: upgrade to golangci-lint v1.49.0 (#329)

Fixes #242

internal/cmd/docgen/main.go

@@ -8,7 +8,6 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"io/ioutil"
 	"log"
 	"math"
 	"net/url"
@@ -84,7 +83,7 @@ func mainerr() (err error) {
 
 	// Output.
 	if *output != "" {
-		err = ioutil.WriteFile(*output, body, 0o640)
+		err = os.WriteFile(*output, body, 0o640)
 	} else {
 		_, err = os.Stdout.Write(body)
 	}
@@ -103,7 +102,7 @@ var templates embed.FS
 func load() (string, error) {
 	// Prefer explicit filename, if provided.
 	if *tmpl != "" {
-		b, err := ioutil.ReadFile(*tmpl)
+		b, err := os.ReadFile(*tmpl)
 		if err != nil {
 			return "", err
 		}
@@ -125,7 +124,7 @@ func load() (string, error) {
 
 // include template function.
 func include(filename string) (string, error) {
-	b, err := ioutil.ReadFile(filename)
+	b, err := os.ReadFile(filename)
 	if err != nil {
 		return "", err
 	}

internal/inst/table_test.go

@@ -1,7 +1,7 @@
 package inst_test
 
 import (
-	"io/ioutil"
+	"os"
 	"reflect"
 	"sort"
 	"strings"
@@ -187,7 +187,7 @@ func TestInstructionArities(t *testing.T) {
 }
 
 func TestStdLibOpcodes(t *testing.T) {
-	b, err := ioutil.ReadFile("testdata/stdlibopcodes.txt")
+	b, err := os.ReadFile("testdata/stdlibopcodes.txt")
 	if err != nil {
 		t.Fatal(err)
 	}

internal/test/utils.go

@@ -4,7 +4,6 @@ package test
 import (
 	"flag"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/exec"
@@ -32,7 +31,7 @@ func Assembles(t *testing.T, asm []byte) {
 	defer clean()
 
 	asmfilename := filepath.Join(dir, "asm.s")
-	if err := ioutil.WriteFile(asmfilename, asm, 0o600); err != nil {
+	if err := os.WriteFile(asmfilename, asm, 0o600); err != nil {
 		t.Fatal(err)
 	}
 
@@ -46,7 +45,7 @@ func Assembles(t *testing.T, asm []byte) {
 func TempDir(t *testing.T) (string, func()) {
 	t.Helper()
 
-	dir, err := ioutil.TempDir("", "avo")
+	dir, err := os.MkdirTemp("", "avo")
 	if err != nil {
 		t.Fatal(err)
 	}