Remove eh0 feature from default features (#122)

`embedded-hal` v1.0 came out in January 2024, going forward new code
should use this. Accordingly, `eh0` support should no longer be part of
the default features to reduce the amount of dependencies being pulled
in.

Existing code will likely still use it, thus consumers will have to
explicitly enable the feature when upgrading.

CHANGELOG.md

@@ -15,6 +15,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 ### Changed
 
 - Drop fixed MSRV policy (#124)
+- **Breaking**: the `eh0` feature is no longer part of the default features.
+  it still exists as an optional feature and has to be explicitly added when needed.
 
 
 ## 0.11.1 - 2024-06-02

Cargo.toml

@@ -26,7 +26,7 @@ eh1 = ["dep:eh1", "dep:embedded-hal-nb"]
 embedded-time = ["dep:embedded-time", "dep:void"]
 embedded-hal-async = ["dep:embedded-hal-async"]
 
-default = ["eh0", "eh1", "embedded-time"]
+default = ["eh1", "embedded-time"]
 
 [dependencies]
 eh0 = { package = "embedded-hal", version = "0.2.7", features = ["unproven"], optional = true }