Make bleach_linkify safe

[spenserblack]

Is your feature request related to a problem? Please describe.

Right now, html|bleach is marked as safe, but html|bleach_linkify is an unsafe, raw string.

I guess this is intended behavior given the test linked below, but this seems like strange behavior to me

django-bleach/django_bleach/tests/test_templatetags.py

Line 58 in aefb860

'{{ link_this|bleach_linkify|safe }}'

Describe the solution you'd like

Just like the bleach template tag, I'd like bleach_linkify to return a safestring, not a raw string.

Describe alternatives you've considered

As the linked test shows, html|bleach_linkify|safe seems to be OK (in my usage I actually had to use html|bleach|bleach_linkify|safe).

Additional context
AFAIK bleach does support a way to both sanitize HTML and linkify in one pass. Maybe that's a possibility?