Fix segmentation violation

Author: nhatthm

init_test.go

@@ -2,14 +2,20 @@ package python_test
 
 import (
 	"os"
+	"runtime"
 	"testing"
 
 	python3 "go.nhat.io/python/v3"
 )
 
 // TestMain is the entry point for the test suite.
 func TestMain(m *testing.M) {
-	defer python3.Finalize()
+	runtime.LockOSThread()
 
-	os.Exit(m.Run()) // nolint: gocritic
+	ret := m.Run()
+
+	python3.Finalize()
+	runtime.UnlockOSThread()
+
+	os.Exit(ret)
 }