[epiphany] Lower required meson version

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d444fe2a60b83cd2dd49766b84315e280ed6e0da
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Sat May 20 09:31:12 2017 -0500

    Lower required meson version
    
    Since we no longer use meson subprojects, this should be sufficient.

 meson.build |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/meson.build b/meson.build
index 9313968..cc52f91 100644
--- a/meson.build
+++ b/meson.build
@@ -1,7 +1,7 @@
 project('epiphany', 'c',
   license: 'GPL3+',
   version: '3.25.1',
-  meson_version: '>= 0.40.0',
+  meson_version: '>= 0.37.0',
   default_options: ['c_std=gnu11']
 )