make a wrapper return type over DB return types (like `IVec`) to not allocate a ...

[todo]

scherzo/src/db/mod.rs

Lines 69 to 72 in 62a5bd4

	// TODO: make a wrapper return type over DB return types (like `IVec`) to not allocate a `Vec`
	pub trait Tree: Send + Sync {
	fn get(&self, key: &[u8]) -> DbResult<Option<Vec<u8>>>;
	fn insert(&self, key: &[u8], value: &[u8]) -> DbResult<Option<Vec<u8>>>;

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This issue was generated by todo based on a TODO comment in 62a5bd4. It's been assigned to @yusdacra because they committed the code.