Make beautifier auto-convert options with dashes into underscores

[bitwiseman]

Description

#1423 is a perfect example of the problem. The CLI takes dashes (such as--wrap-attributes force-expand-multiline), but the beautifier only takes underscores in the names (such as { "wrap_attributes": "force-expand-multiline" }).

This cause tons of confusion and spurious bug reports. The beautifier should convert all dashes in options to underscores before processing. This will result in variability of inputs but will reduce user pain.