upgrade djangocms-link 2.1.2 to 2.3.1

addons/djangocms-link/addon.json

@@ -1,6 +1,6 @@
 {
     "installed-apps": [
         "djangocms_link"
-    ], 
+    ],
     "package-name": "djangocms-link"
 }

requirements.in

@@ -6,7 +6,7 @@ https://control.divio.com/api/v1/apps/serve/aldryn-django-cms/3.5.3.3/0d70ac86-c
 https://control.divio.com/api/v1/apps/serve/aldryn-forms/4.0.1/099d84c4-390a-4c5d-b57d-5a0eacff6627/aldryn-forms-4.0.1.tar.gz#egg=aldryn-forms==4.0.1
 https://control.divio.com/api/v1/apps/serve/aldryn-haystack/0.5.1/bf04cc01-9855-4659-843e-05379cec9ac6/aldryn-haystack-0.5.1.tar.gz#egg=aldryn-haystack==0.5.1
 https://control.divio.com/api/v1/apps/serve/djangocms-history/0.5.3/05803675-6e8d-4637-b14b-1bb8d18b24b3/djangocms-history-0.5.3.tar.gz#egg=djangocms-history==0.5.3
-https://control.divio.com/api/v1/apps/serve/djangocms-link/2.1.2/35b986c1-fafb-46ee-b665-aa36603f233a/djangocms-link-2.1.2.tar.gz#egg=djangocms-link==2.1.2
+https://control.divio.com/api/v1/apps/serve/djangocms-link/2.3.1/0259f5df-efa1-4a00-87f8-c7cfbe873388/djangocms-link-2.3.1.tar.gz#egg=djangocms-link==2.3.1
 https://control.divio.com/api/v1/apps/serve/djangocms-picture/2.1.3/ba08d3d9-6bdb-4e48-b8c5-8b70f762685e/djangocms-picture-2.1.3.tar.gz#egg=djangocms-picture==2.1.3
 https://control.divio.com/api/v1/apps/serve/djangocms-text-ckeditor/3.7.0/a61a9c3c-a1a5-41aa-b996-8e5451701b5b/djangocms-text-ckeditor-3.7.0.tar.gz#egg=djangocms-text-ckeditor==3.7.0
 https://control.divio.com/api/v1/apps/serve/django-filer/1.4.1/e7e860ea-0af6-4fc8-95e1-ad2580ba0bac/django-filer-1.4.1.tar.gz#egg=django-filer==1.4.1