[extensions-web] requirements: restrict maximum pygments version for now. Review later.

[Yuri Konotopov <ykonotopov src gnome org>]

commit e2c5e0a06fd7d1082b59a4007810d977b2ebb28e
Author: Yuri Konotopov <ykonotopov gnome org>
Date:   Sat Dec 1 23:56:01 2018 +0400

    requirements: restrict maximum pygments version for now. Review later.

 requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/requirements.txt b/requirements.txt
index 9350a50..0d73079 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@ Django == 1.8.15
 django-autoslug >= 1.4.1
 django-contrib-comments == 1.7.3
 django-registration == 2.1.2
-Pygments >= 1.4
+Pygments >= 1.4,<2
 pillow >= 2.0.0
 chardet >= 2.2.1