docs: install with --locked

[lautarodragan]

Hi! Thanks for creating and sharing this wonderful cli app. I was looking for a lightweight tool to read spreadsheets (LibreOffice is massive and overkill for my use-case), and this is perfect.

I don't know if this suggestion is correct, but, in my case, cargo run / cargo build runs fine, but cargo install breaks with ~10 errors. Apparently, it's because cargo install doesn't completely honor Cargo.lock unless --locked (or --frozen) is passed.

All the reported errors, when running without --locked, are related to the trait bound impl ratatui::widgets::Widget + '_: Widget is not satisfied and mismatched types.

It looks like it resolves two different versions of ratatui, 0.24 and 0.29:

= note: `Style` and `ratatui::style::Style` have similar names, but are actually distinct types
note: `Style` is defined in crate `ratatui`
    --> /home/taro/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ratatui-0.24.0/src/style.rs:192:1
     |
192  | pub struct Style {
     | ^^^^^^^^^^^^^^^^
note: `ratatui::style::Style` is defined in crate `ratatui`
    --> /home/taro/.cargo/registry/src/index.crates.io-6f17d22bba15001f/ratatui-0.29.0/src/style.rs:247:1
     |
247  | pub struct Style {
     | ^^^^^^^^^^^^^^^^
     = note: perhaps two different versions of crate `ratatui` are being used?

I think the "culprit" seems to be tui-textarea:

ratatui = { version = ">=0.23.0, <1", default-features = false, optional = true }

This difference in default behavior between run and install seems to be a thing, and it's definitely very counter-intuitive.

I can kinda reproduce it if I remove the Cargo.lock:

$ cargo tree | grep tui
├── ratatui v0.24.0
└── tui-textarea v0.4.0
    ├── ratatui v0.24.0 (*)

$ rm Cargo.lock

$ cargo clean

$ cargo tree | grep tui
├── ratatui v0.24.0
└── tui-textarea v0.4.0
    ├── ratatui v0.29.0

rm'ing Cargo.lock actually causes cargo build to fail.

Upgrading ratatui to "0.27.0" and tui-textarea to "0.5.0" "fixes" this issue.

$ cargo tree | grep tui
├── ratatui v0.27.0
└── tui-textarea v0.5.3
    ├── ratatui v0.27.0 (*)

I opened #11 with that dependency upgrade.

Optional dependencies are always such a pain...

[lautarodragan]

Thanks @fuhan666 :D