Add opencv

bob/devtools/data/conda_build_config.yaml

@@ -77,12 +77,12 @@ zip_keys:
 
 # This version of bob-devel will be used at test time of packages:
 bob_devel:
-  - 2020.11.17
+  - 2020.11.19
 
 # This version of beat-devel will be used at test time of packages. Notice it
 # uses bob-devel and should have a version that is greater or equal its value
 beat_devel:
-  - 2020.11.17
+  - 2020.11.19
 
 # The build time only dependencies (build requirements).
 # Updating these to the latest version all the time is OK and a good idea.
@@ -165,6 +165,8 @@ ncurses:
   - 6.2
 nose:
   - 1.3.7
+opencv:
+  - 4.5.0
 pandas:
   - 1.1.3
 pillow: