Please do not submit pull requests changing the `version.hpp`

or the single-include `catch.hpp` file, these are changed

only when a new release is made.

Before submitting a PR you should probably read the contributor documentation

at docs/contributing.md. It will tell you how to properly test your changes.

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## Description

Describe the what and the why of your pull request. Remember that these two

are usually a bit different. As an example, if you have made various changes

to decrease the number of new strings allocated, thats what. The why probably

was that you have a large set of tests and found that this speeds them up.

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## GitHub Issues

If this PR was motivated by some existing issues, reference them here.

If it is a simple bug-fix, please also add a line like 'Closes #123'

to your commit message, so that it is automatically closed.

If it is not, don't, as it might take several iterations for a feature

to be done properly. If in doubt, leave it open and reference it in the

PR itself, so that maintainers can decide.

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