Examples fail to build

[rubberduck203]

$ cargo build --examples
   Compiling f3 v0.6.1 (/Users/rubberduck/src/f3)
error: use of deprecated item 'hal::prelude::_embedded_hal_digital_OutputPin::set_low': Deprecated because the methods cannot return errors. Users should use the traits in digital::v2.
   --> src/led.rs:168:18
    |
168 |         self.pex.set_low()
    |                  ^^^^^^^
    |
note: lint level defined here
   --> src/lib.rs:40:9
    |
40  | #![deny(warnings)]
    |         ^^^^^^^^
    = note: `#[deny(deprecated)]` implied by `#[deny(warnings)]`

error: use of deprecated item 'hal::prelude::_embedded_hal_digital_OutputPin::set_high': Deprecated because the methods cannot return errors. Users should use the traits in digital::v2.
   --> src/led.rs:173:18
    |
173 |         self.pex.set_high()
    |                  ^^^^^^^^

error: aborting due to 2 previous errors

error: could not compile `f3`.

To learn more, run the command again with --verbose.