renamin 0.16.2 version to 0.16.20

added version 0.16.19

added version 0.16.18

updated flow-bin to 0.73.0

fix #54

updated flow-bin to 0.72.0

updated version

updated changelog/0.16.13.txt

fixed KeyError: 'test' in show_unused_variables.py

updated global_vars.py plugin_version