Add support for 'ascii' flag/arg (sets 'barChar' to '=' when true). Ensure that 'opts' arg is always type object. Refactor 'printValues' assignment.
Add support for 'ascii' flag/arg (sets 'barChar' to '=' when true). Ensure that 'opts' arg is always type object. Refactor 'printValues' assignment.

icyflame/bar-horizontal