package/harfbuzz: bump to version 4.2.0

Since the major release changed I've built successfully all packages that
have direct dependency to harfbuzz:
- efl
- libass
- mupdf
- pango
- qt5base
- sdl2_ttf
- supertuxkart
- vlc
- webkitgtk
- wpewebkit

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/harfbuzz/harfbuzz.hash

@@ -1,3 +1,3 @@
 # Locally computed
-sha256  7158a87c4db82521fc506711f0c8864115f0292d95f7136c8812c11811cdf952  harfbuzz-3.4.0.tar.xz
+sha256  f2200f177768bdc21445aa09703326f3bbe8114ac083d081fe1a79d305c7ae73  harfbuzz-4.2.0.tar.xz
 sha256  4345e1735f8bc6d812fed5180cabb5a5e88a4109d332652f2a45c13cfa5ee692  COPYING

package/harfbuzz/harfbuzz.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-HARFBUZZ_VERSION = 3.4.0
+HARFBUZZ_VERSION = 4.2.0
 HARFBUZZ_SITE = https://github.com/harfbuzz/harfbuzz/releases/download/$(HARFBUZZ_VERSION)
 HARFBUZZ_SOURCE = harfbuzz-$(HARFBUZZ_VERSION).tar.xz
 HARFBUZZ_LICENSE = MIT, ISC (ucdn library)