Update check_compiler_version macro to handle latest Visual Studios

[jmarrec]

Changelog: Fix: A simple addition to ensure right compiler version is found on windows.
Docs: omit

(I have read the contributing guide. It's such a small thing that I didn't bother to create an issue first for this though).

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[memsharded]

Hi @jmarrec

Thanks for trying to contribute this PR.
The tests are broken, you can see the output of CI here: https://conan-ci.jfrog.info/blue/organizations/jenkins/ConanTestSuite/detail/PR-5041/1/pipeline. You can also try to run the tests locally with nosetests.

The problem is that you are using lexicographic string compare with STRLESS and you probably need to use numerical or version comparison in order to achieve the expected result. Please have a look at it, thanks!

[jmarrec]

Hi, yeah I did see the failures earlier. Will look when back at a computer. What's the earliest cmake you intend to support? (Some functions aren't available in older cmake versions (eg strless_equal, not that I intend to use this one in particular)).I see some doc examples with 2.8, is that so?

[memsharded]

Hi.
Yes, we are still trying to support CMake down to 2.8.12. This might change in the future, but so far, we are maintaining ourselves a few hacks to be compatible. Unfortunately there are still some users that can't upgrade cmake from that version easily.

[memsharded]

Great, thanks for the contribution