[pango] build: Bump required harfbuzz version

[Kalev Lember <klember src gnome org>]

commit edb0dff3454d4d9ce6242a0f30ddaef993ee1e89
Author: Kalev Lember <klember redhat com>
Date:   Mon May 7 12:34:21 2018 +0200

    build: Bump required harfbuzz version
    
    We use hb_variation_t that was added in harfbuzz 1.4.2.

 configure.ac |    2 +-
 meson.build  |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 5e879a8..a0cf128 100644
--- a/configure.ac
+++ b/configure.ac
@@ -208,7 +208,7 @@ AM_CONDITIONAL(CROSS_COMPILING, [test $cross_compiling = yes])
 # Checks for HarfBuzz
 #
 have_harfbuzz=false
-PKG_CHECK_MODULES(HARFBUZZ, harfbuzz >= 1.2.3, have_harfbuzz=true, :)
+PKG_CHECK_MODULES(HARFBUZZ, harfbuzz >= 1.4.2, have_harfbuzz=true, :)
 AM_CONDITIONAL(HAVE_HARFBUZZ, $have_harfbuzz)
 
 #
diff --git a/meson.build b/meson.build
index 9a5a4c7..9721e27 100644
--- a/meson.build
+++ b/meson.build
@@ -196,7 +196,7 @@ pango_deps = []
 glib_req_version = '>= 2.33.12'
 fribidi_req_version = '>= 0.19.7'
 libthai_req_version = '>= 0.1.9'
-harfbuzz_req_version = '>= 1.2.3'
+harfbuzz_req_version = '>= 1.4.2'
 fontconfig_req_version = '>= 2.11.91'
 xft_req_version = '>= 2.0.0'
 cairo_req_version = '>= 1.12.10'