setup.py: BuildStream now requires blessings.

Blessings gives us some code for positioning the cursor on terminals
which support that (almost all terminals on linux), this lets us
print some things always at the bottom of the output.

1 files changed, 2 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index cbbd5115a..3efe01e11 100755
--- a/setup.py
+++ b/setup.py
@@ -81,7 +81,8 @@ setup(name='buildstream',
           'psutil',
           'ruamel.yaml',
           'pluginbase',
-          'Click'
+          'Click',
+          'blessings'
       ],
       entry_points='''
       [console_scripts]