[dev] Update version of all BEAT packages

The latest versions are needed because they provide
the required test data/information updates.

dev.yml

@@ -11,9 +11,9 @@ dependencies:
   - beat-devel=2020.01.09
 
   # beat dependencies matching release.cfg
-  - beat.core=1.10.3
-  - beat.backend.python=1.7.7
-  - beat.cmdline=1.7.1
+  - beat.core=1.10.4
+  - beat.backend.python=1.7.8
+  - beat.cmdline=1.7.4
 
   # requirements.txt, they are indirectly pinned through the above
   - docopt