v0.29.0

• Show the Comments column by default: without --type, count and diff tables now show code, tests, docs, comments, and total. Pass --type code,tests,docs,total for the previous columns. JSON, YAML, and XML output report the new selection in line_types (#179).
• Group digits in count, diff, and commit tables by default (for example 12,345, following the active locale). --number-fmt now takes a value: --number-fmt=false, or number_fmt = false in rustloc.toml, prints plain digits as before; a bare --number-fmt or --number-fmt=true keeps grouping on, and the flag overrides the config file (#179).