Update to latest quantlib

[igitur]

Hi Eric,

I want to work on some other features, but first I had to bring QuantlibXL in line with the latest version of Quantlib. This required some changes to qlFRA* and Risky Bonds. I based this PR on your v1.23.x branch, but maybe you want to create a new branch name based on the latest Quantlib release version. Let me know and I'll rebase. Thanks

[kalam360]

Hi,
Any update on this. I want to work on the latest QuantLib release as well.

[igitur]

Hi @kalam360 .

I recently started doing a bit of work to update it to to QuantLib 1.34. Not completed yet. But may I ask what you expect out of an updated version? New QuantLib features are not automatically exposed in QuantLibXL. That would require specific enhancements. If there are bug fixes in QuantLib, however, then they should propagate through.

[kalam360]

Hi @igitur
For my work I have been using QuantLibXL 1.22. So far it seems fine. But I was curious why its far behind the latest QuantLib release. So as a personal challenge I started building the project with newer versions and see I could fix some of the issue. I could build it with 1.33 and some other versions as well but it crashes in Excel. As there are not much activity in the project, your pull request seemed the recent ones. My goal is to learn and in turn try to contribute as little as I can.