[pango/cairo-version] Bump the cairo dependency

[Matthias Clasen <matthiasc src gnome org>]

commit f20dcf59b322952ea68879e329fabfebfff1815a
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Aug 2 11:31:51 2019 -0400

    Bump the cairo dependency
    
    The combination of non-rounding pango with
    not-subpixel-positioning cairo yields unsatisfactory
    results, so bump the cairo dependency.

 meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/meson.build b/meson.build
index 619e6f33..b7b57db3 100644
--- a/meson.build
+++ b/meson.build
@@ -194,7 +194,7 @@ libthai_req_version = '>= 0.1.9'
 harfbuzz_req_version = '>= 2.0.0'
 fontconfig_req_version = '>= 2.11.91'
 xft_req_version = '>= 2.0.0'
-cairo_req_version = '>= 1.12.10'
+cairo_req_version = '>= 1.17.4'
 
 # libm
 mathlib_dep = cc.find_library('m', required: false)