Fix modern django compatibility.

.travis.yml

@@ -2,8 +2,11 @@ sudo: false
 language: python
 python:
   - "2.7"
-  - "3.3"
   - "3.4"
+  - "3.5"
+  - "3.6"
+  - "3.7"
+  - "3.8"
 install: pip install tox-travis
 script: tox
 branches:

django_components/templatetags/component_tags.py

@@ -1,5 +1,6 @@
 from django import template
 from django_components.component import registry
+from django.utils.safestring import mark_safe
 
 register = template.Library()
 
@@ -11,7 +12,7 @@ def component_dependencies_tag():
     for component_class in unique_component_classes:
         out.append(component_class.render_dependencies())
 
-    return "\n".join(out)
+    return mark_safe("\n".join(out))
 
 @register.simple_tag(name="component")
 def component_tag(name, *args, **kwargs):

tox.ini

@@ -7,7 +7,7 @@ envlist = py27-django111,py34-django{111,20},py{35,36,37,38}-django{111,20,21,22
 3.5 = py35-django{111,20,21,22}
 3.6 = py36-django{111,20,21,22}
 3.7 = py37-django{111,20,21,22}
-3.8 = py37-django{111,20,21,22}
+3.8 = py38-django{111,20,21,22}
 
 [testenv]
 deps =