Add emacs-like cursor navigation to dateselect; fix lint (#187)

* Add emacs-like cursor navigation to dataselect

Accept Ctrl-p and Ctrl-b as up and down. Additionally accept Ctrl-b
and Ctrl-f as left and right.

* Fix clippy lint for unwrap_or_default

Latest nightly clippy warns:

    warning: use of `unwrap_or_else` to construct default value
      --> inquire/src/prompts/multiselect/prompt.rs:67:14
       |
    67 |             .unwrap_or_else(BTreeSet::new);
       |              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: try: `unwrap_or_default()`
       |
       = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unwrap_or_default
       = note: `#[warn(clippy::unwrap_or_default)]` on by default

---------

Co-authored-by: Mikael Mello <git@mikaelmello.com>

CHANGELOG.md

@@ -18,9 +18,11 @@
     `Some(score)`: score determines the order of options, higher score, higher on the list of options.
 - Implement fuzzy search as default on Select and MultiSelect prompts. [#176](https://github.com/mikaelmello/inquire/pull/176)
 - Add new option on Select/MultiSelect prompts allowing to reset selection to the first item on filter-input changes. [#176](https://github.com/mikaelmello/inquire/pull/176)
-- Keybindings Ctrl-p and Ctrl-n added for Up and Down actions
+- Emacs-like keybindings added where applicable:
+ - Ctrl-p/Ctrl-n for up/down
+ - Ctrl-b/Ctrl-f for left/right
+ - Ctrl-j/Ctrl-g for enter/cancel
 - Added 'with_starting_filter_input' to both Select and MultiSelect, which allows for setting an initial value to the filter section of the prompt.
-- Keybindings Ctrl-j and Ctrl-g added for Enter and Cancel actions
 
 ### Fixes
 

inquire/src/prompts/dateselect/action.rs

@@ -46,10 +46,18 @@ impl InnerAction for DateSelectPromptAction {
         }
 
         let action = match key {
-            Key::Left(KeyModifiers::NONE) => Self::GoToPrevDay,
-            Key::Right(KeyModifiers::NONE) => Self::GoToNextDay,
-            Key::Up(KeyModifiers::NONE) => Self::GoToPrevWeek,
-            Key::Down(KeyModifiers::NONE) | Key::Tab => Self::GoToNextWeek,
+            Key::Left(KeyModifiers::NONE) | Key::Char('b', KeyModifiers::CONTROL) => {
+                Self::GoToPrevDay
+            }
+            Key::Right(KeyModifiers::NONE) | Key::Char('f', KeyModifiers::CONTROL) => {
+                Self::GoToNextDay
+            }
+            Key::Up(KeyModifiers::NONE) | Key::Char('p', KeyModifiers::CONTROL) => {
+                Self::GoToPrevWeek
+            }
+            Key::Down(KeyModifiers::NONE) | Key::Char('n', KeyModifiers::CONTROL) | Key::Tab => {
+                Self::GoToNextWeek
+            }
             Key::Left(KeyModifiers::CONTROL) => Self::GoToPrevMonth,
             Key::Right(KeyModifiers::CONTROL) => Self::GoToNextMonth,
             Key::Up(KeyModifiers::CONTROL) => Self::GoToPrevYear,