The v2 implementation uses Node 12, which is end-of-life on April 30, 2022.
See https://nodejs.org/en/about/releases/. Update to v3, which is based on
Node 16 whose support lasts until April 30, 2024.

…ust-lang#2583)

LocalPool::try_run_one and run_until_stalled now correctly re-try when a
future "yields" by calling wake and returning Pending.

```
error: unresolved link to `select`
   --> futures-util/src/future/try_future/mod.rs:272:17
    |
272 |     /// using [`select!`] or [`join!`].
    |                 ^^^^^^^ no item named `select` in scope
    |
    = note: `-D rustdoc::broken-intra-doc-links` implied by `-D warnings`
    = note: `macro_rules` named `select` exists in this crate, but it is not in scope at this link's location

error: unresolved link to `join`
   --> futures-util/src/future/try_future/mod.rs:272:32
    |
272 |     /// using [`select!`] or [`join!`].
    |                                ^^^^^ no item named `join` in scope
    |
    = note: `macro_rules` named `join` exists in this crate, but it is not in scope at this link's location

error: unresolved link to `select`
   --> futures-util/src/future/try_future/mod.rs:320:27
    |
320 |     /// type when using [`select!`] or [`join!`].
    |                           ^^^^^^^ no item named `select` in scope
    |
    = note: `macro_rules` named `select` exists in this crate, but it is not in scope at this link's location

error: unresolved link to `join`
   --> futures-util/src/future/try_future/mod.rs:320:42
    |
320 |     /// type when using [`select!`] or [`join!`].
    |                                          ^^^^^ no item named `join` in scope
    |
    = note: `macro_rules` named `join` exists in this crate, but it is not in scope at this link's location

error: unresolved link to `select`
    --> futures-util/src/stream/stream/mod.rs:1802:15
     |
1802 |     /// the [`select!`] macro.
     |               ^^^^^^^ no item named `select` in scope
     |
     = note: `macro_rules` named `select` exists in this crate, but it is not in scope at this link's location
```

…#2590)

Although a relatively small change, it makes the code a little bit
more readable than the originally nested `match` expressions.

SeeKRelative -> SeekRelative

Fixes a minor typo by changing "a tasks" to "a task" in the
documentation comment for enter.

Signed-off-by: hasheddan <georgedanielmangum@gmail.com>

`select_early_exit` creates a stream that produces elements while
either stream contains elements, and terminates when either stream
runs out of elements.