[epiphany] Require WebKitGTK+ 2.17.3

[Michael Catanzaro <mcatanzaro src gnome org>]

commit aae83d4b02ceb8078fce3fb66f876c7265fa71fb
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Tue May 23 16:21:01 2017 -0500

    Require WebKitGTK+ 2.17.3
    
    For webkit_context_menu_item_new_from_gaction

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 61f25df..a522ea5 100644
--- a/meson.build
+++ b/meson.build
@@ -44,7 +44,7 @@ configure_file(
 
 glib_requirement = '>= 2.46.0'
 gtk_requirement = '>= 3.22.13'
-webkitgtk_requirement = '>= 2.16.0'
+webkitgtk_requirement = '>= 2.17.3'
 
 cairo_dep = dependency('cairo', version: '>= 1.2')
 gcr_dep = dependency('gcr-3', version: '>= 3.5.5')