fix: Return date as a string instead of local time

pkg/diyanetapi/provider_test.go

@@ -30,6 +30,8 @@ func TestDiyanetAPI_GetByCoords(t *testing.T) {
 		times, err := p.Get(context.Background(), "11104")
 		assert.NoError(t, err)
 		assert.NotEmpty(t, times)
-		t.Logf("%#+v", times[0])
+		for _, time := range times {
+			t.Log(time)
+		}
 	})
 }