v0.12.0

• bump to libdparse 0.14.0
• dfmt now errors with non-zero exit code when failing to parse the tokens instead of outputting !ERROR!. Faulty non-finished code can still be formatted fine (fix #469)
• support keeping existing line breaks using new --keep_line_breaks true option (fix #7, #254, #270, #463)
• Adds space after in/out contracts statements (fix #448)
• fixes line comment after template arguments wrapping (fix #454)
• test runner improvements
• fix range error when code ends with scope (exit) (#474, #475)