correct minimum freetype requirement for Fontval.

[HinTak]

See #1524 (comment)

The passage:

"If your vanilla system freetype is used instead, then all FontValidator tests will still be run, except for the hinting validation ones."

is wrong. A few of the table tests requires FreeType 2.6.1 minimum. That's called the "ComputeMetrics Patch".

You know you could just use the supplied binary. For the Nth time.

[felipesanches]

I won't officially use the supplied binary because it lacks corresponding source code. Users can always setup their system with any build of FontValidator, of course. But that's not what I'll run on Travis for testing FontBakery, because I can't blindly trust binaries without source code.

Also, the prebuilt custom freetype in this repo (https://github.com/googlefonts/fontbakery/tree/ede92e09b96d51caf56cc01b5fd7c3554782cf0f/prebuilt/custom_freetype) was built from the tagged 2.6.4 release (which is greater than 2.6.1 ...) and the full corresponding source code for that is available here: felipesanches/freetype2@1ceb2b5

[felipesanches]

You say "correct minimum requirement" in the issue title. If that's wrongly stated somewhere, we can fix the info. Otherwise, this is a non-issue and thus should be closed.

[HinTak]

Well, now you are asking people to trust your repo instead of mine :).

[felipesanches]

I can't trust code that I can't read. Please stop flooding the issue tracker.