Remove syscalls and change go version

Author: Тимофей Шкредов

go.mod

@@ -1,6 +1,6 @@
 module github.com/go-python/gpython
 
-go 1.18
+go 1.25
 
 require (
 	github.com/google/go-cmp v0.5.8

main.go

@@ -14,7 +14,6 @@ import (
 	"os/signal"
 	"runtime"
 	"runtime/pprof"
-	"syscall"
 
 	"github.com/go-python/gpython/py"
 	"github.com/go-python/gpython/repl"
@@ -51,7 +50,7 @@ func xmain(args []string) {
 	defer ctx.Close()
 
 	sigCh := make(chan os.Signal, 1)
-	signal.Notify(sigCh, os.Interrupt, syscall.SIGINT, syscall.SIGTERM)
+	signal.Notify(sigCh, os.Interrupt)
 	go func() {
 		for range sigCh {
 			ctx.SetInterrupt()

stdlib/stdlib.go

@@ -45,7 +45,7 @@ type context struct {
 	closed    bool
 	running   sync.WaitGroup
 	done      chan struct{}
-	interrupt int32 // atomic; non-zero means KeyboardInterrupt pending
+	interrupt atomic.Int32 // non-zero means KeyboardInterrupt pending
 }
 
 // NewContext creates a new gpython interpreter instance context.
@@ -196,12 +196,12 @@ func (ctx *context) ResolveAndCompile(pathname string, opts py.CompileOpts) (py.
 
 // See interface py.Context defined in py/run.go
 func (ctx *context) SetInterrupt() {
-	atomic.StoreInt32(&ctx.interrupt, 1)
+	ctx.interrupt.Store(1)
 }
 
 // See interface py.Context defined in py/run.go
 func (ctx *context) CheckInterrupt() bool {
-	return atomic.SwapInt32(&ctx.interrupt, 0) != 0
+	return ctx.interrupt.Swap(0) != 0
 }
 
 func (ctx *context) pushBusy() error {