Bump to env and xdr dependencies to 21.0.1 (#1259)

### What

[TODO: Short statement about what is changing.]

### Why

[TODO: Why this change is being made. Include any context required to
understand the why.]

### Known limitations

[TODO or N/A]

Cargo.toml

@@ -24,25 +24,25 @@ soroban-ledger-snapshot = { version = "21.0.0", path = "soroban-ledger-snapshot"
 soroban-token-sdk = { version = "21.0.0", path = "soroban-token-sdk" }
 
 [workspace.dependencies.soroban-env-common]
-version = "=21.0.0"
+version = "=21.0.1"
 # git = "https://github.com/stellar/rs-soroban-env"
 # rev = "8867a5d5b05681bde5eb8cf2031f615b1e8d8889"
 
 [workspace.dependencies.soroban-env-guest]
-version = "=21.0.0"
+version = "=21.0.1"
 # git = "https://github.com/stellar/rs-soroban-env"
 # rev = "8867a5d5b05681bde5eb8cf2031f615b1e8d8889"
 
 [workspace.dependencies.soroban-env-host]
-version = "=21.0.0"
+version = "=21.0.1"
 # git = "https://github.com/stellar/rs-soroban-env"
 # rev = "8867a5d5b05681bde5eb8cf2031f615b1e8d8889"
 
 [workspace.dependencies.stellar-strkey]
 version = "=0.0.8"
 
 [workspace.dependencies.stellar-xdr]
-version = "=21.0.0"
+version = "=21.0.1"
 default-features = false
 features = ["curr"]
 # git = "https://github.com/stellar/rs-stellar-xdr"

soroban-spec-rust/src/types.rs

@@ -175,9 +175,6 @@ pub fn generate_type_ident(spec: &ScSpecTypeDef) -> TokenStream {
             let n = Literal::u32_unsuffixed(b.n);
             quote! { soroban_sdk::BytesN<#n> }
         }
-        ScSpecTypeDef::Hash(_) => {
-            todo!("Hash type is unsupported, remove this arm when https://github.com/stellar/stellar-xdr/pull/184 is merged")
-        }
         ScSpecTypeDef::Udt(u) => {
             let ident = format_ident!("{}", u.name.to_utf8_string().unwrap());
             quote! { #ident }