Update to heapless 0.9

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "flexiber"
-version = "0.1.3"
+version = "0.2.0"
 authors = ["Nicolas Stalder <n@stalder.io>", "RustCrypto Developers"]
 license = "Apache-2.0 OR MIT"
 edition = "2021"
@@ -24,11 +24,11 @@ flexiber_derive = { version = "0.1.3", optional = true, path = "derive" }
 flexiber_derive = { version = "=0.1.3", path = "derive" }
 
 [dependencies.heapless]
-version = "0.7.0"
+version = "0.9.0"
 optional = true
 
 [dev-dependencies]
-hex-literal = "0.3.1"
+hex-literal = "1"
 
 [features]
 alloc = []

src/traits.rs

@@ -126,10 +126,7 @@ pub trait Encodable {
 pub trait EncodableHeapless: Encodable {
     /// Encode this message as BER-TLV, appending it to the provided
     /// heapless byte vector.
-    fn encode_to_heapless_vec<const N: usize>(
-        &self,
-        buf: &mut heapless::Vec<u8, N>,
-    ) -> Result<Length> {
+    fn encode_to_heapless_vec(&self, buf: &mut heapless::VecView<u8>) -> Result<Length> {
         let expected_len = self.encoded_length()?.to_usize();
         let current_len = buf.len();
         // TODO(nickray): add a specific error for "Overcapacity" conditional on heapless feature?