fix pichillilorenzo#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

Fixed NoneType error on self.completions.append(completion) in /src/l…

…isteners/completion.py

improved unused variable feature pichillilorenzo#24

release 0.15.0, fix pichillilorenzo#35, fix pichillilorenzo#24, fix p…

…ichillilorenzo#28, fix pichillilorenzo#29, fix pichillilorenzo#32, improved some refactor commands and folder_explorer

updated changelog