Log Message:
sysutils/felix: update to 0.9.1

v0.9.1 (2022-05-11)
Fixed
- Fix bug that after `:h`, cursor move can cause unexpected panic.

Changed
- Wrap preview text.

v0.9.0 (2022-05-10)
Added
- New command: `v` to toggle whether to show i) part of the content for text
  file (no wrapping and static), or ii) contents tree for directory. Note that
  this preview feature may not work effectively with small terminal.
- trying to make felix user guide (just to show how to use each commands)
  by mdbook

Changed
- felix now works with smaller terminal size (4 rows and 4 columns is the
  minimum). If column is fewer than 28, modified time is not displayed.
- Huge refactoring overall.
  - use `struct colors` for `state.layout.colors`
  - `is_hidden` moved to `ItemInfo`'s field, make it easier to toggle
    show/hidden items
  - in `open_files` method, use `ItemInfo`'s existing field to get extension
  - `Iteminfo.ext` to `Option<String>`
  - split `move_cursor` method to multiple methods
- Inverted color on the last row (to show distinctively)

Fixed
- Show help text correctly in small window size
  (scrollable with `j` | `k` | `Up` | `Down`)
- 'P' to print manipulation lists (put/delete/rename) is changed to work only
  when RUST_LOG has a value.