Update FreeType from v2.9.0 to 2.10.4 version

https://sourceforge.net/projects/freetype/files/freetype2/2.10.4/

CHANGES BETWEEN 2.10.3 and 2.10.4

I. IMPORTANT BUG FIXES

• A heap buffer overflow has been found in the handling of embedded
  PNG bitmaps, introduced in FreeType version 2.6.

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15999

If you use option FT_CONFIG_OPTION_USE_PNG you should upgrade
immediately.

FreeType 2.10.3
2020-10-10

This is a maintenance release, having better support for TrueType glyphs with overlapping contours. See the list of changes for more details.

A warning for distribution maintainers: Version 2.10.3 and later may break the build of ghostscript, due to ghostscript's use of a withdrawn macro that wasn't intended for external usage.

FreeType 2.10.2
2020-05-09

Besides various maintenance fixes, this release comes with support of WOFF 2 fonts. More details are listed in the list of changes.

FreeType 2.10.1
2019-07-01

A new maintenance release, fixing bytecode hinting of OpenType variation fonts and cmap processing of PCF fonts, among other things. Check the list of changes for more fixes.

FreeType 2.10.0
2019-03-15

This release brings one notable feature, namely support for color-layered outline glyphs (for example, scalable emoji glyphs). Additionally, the API reference has been completely overhauled and modernized, as already announced.

As usual, many minor fixes and corrections have been applied

FreeType 2.9.1
2018-05-02

This is a maintenance release; most importantly fixing correct handling of Type 1 fonts with flex features, which was broken in version 2.9. An overview of the remaining changes is given here. All users should upgrade.