Fix #1 - dependencies from other repos fail task execution

json.response.docs.first() fails if returned list is empty which can happen
when asking for a dependency provided by other repository. In addition
phantom new versions like 'net.gvmtool:gvm-sdk:null' are not longer displayed.
Header is no longer displayed when no new versions are found
Simplify asynchronous call with closure coercion

(and class aliasing)
0.0.2 released
Merge branch 'szpak-topic/1-failEmptyList'