[epiphany] Require WebKitGTK+ 2.19.4

[Michael Catanzaro <mcatanzaro src gnome org>]

commit a24651b4e28d43e2e0404aed9a0e1dc6dcaa8563
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Wed Jan 3 13:49:12 2018 -0600

    Require WebKitGTK+ 2.19.4
    
    For WebKitWebPage::will-submit-form and WebKitFormSubmissionStep
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742573

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index f164964..afa06cc 100644
--- a/meson.build
+++ b/meson.build
@@ -59,7 +59,7 @@ configure_file(
 glib_requirement = '>= 2.52.0'
 gtk_requirement = '>= 3.22.13'
 nettle_requirement = '>= 3.2'
-webkitgtk_requirement = '>= 2.19.2'
+webkitgtk_requirement = '>= 2.19.4'
 
 cairo_dep = dependency('cairo', version: '>= 1.2')
 gcr_dep = dependency('gcr-3', version: '>= 3.5.5')