Log Message:
textproc/ruby-yard: update to 0.9.12

# [0.9.12] - November 26th, 2017

[0.9.12]: https://github.com/lsegal/yard/compare/v0.9.11...v0.9.12

- Be more explicit about lack of support for absolute paths in extra files
  specified by `yard doc` command.

# [0.9.11] - November 23rd, 2017

[0.9.11]: https://github.com/lsegal/yard/compare/v0.9.10...v0.9.11

- Fixed security issue in `--readme` that allowed for arbitrary file reads on
  disk. Credit to ztz <ztz@ztz.me> for discovering this issue.
- Improved styling for inline code blocks (#1142).

# [0.9.10] - November 18th, 2017

[0.9.10]: https://github.com/lsegal/yard/compare/v0.9.9...v0.9.10

- Added `--fail-on-warning` option for `yard doc` which exits with a non-zero
  code if there are any warnings (#1093).
- Added support for parsing inside `Struct.new` blocks (#1099).
- Added support new ripper AST tokens (#1104, #1124).
- Fixed an issue where `@see (obj)` reference tags would fail (#1111)
- Fix sorting in `yard stats` (#1123).