updating-libraries.md

Updating harfbuzz

• Get the latest release source code from: https://github.com/behdad/harfbuzz

• Remove the tests folder (it contains a large amount of font data that isn't useful for this repo).

• Update the Harfbuzz section of CMakeLists.txt for any new or moved source files. Also check the Harfbuzz CMakeLists.txt for new compile definitions and flags.

Updating ICU

• Get the latest release source code from: https://github.com/unicode-org/icu

• Take only the source/common and source/stubdata folders and copy them into icu/.

• Update the ICU section of CMakeLists.txt for any new or moved source files.

Updating Freetype

• Get the latest release source code from: https://www.freetype.org/download.html

• That's it!