* EIP-712 impl * added more tests * removed size parsing unwrap * corrected TYPE_REGEX to disallow zero sized fixed length arrays, replaced LinkedHashSet with IndexSet, added API spec to docs, fixed Type::Byte encoding branch * use Option<u64> instead of u64 for Type::Array::Length * replace `.iter()` with `.values()` Co-Authored-By: seunlanlege <seunlanlege@gmail.com> * tabify eip712.rs * use proper comments for docs * Cargo.lock: revert unrelated changes * tabify encode.rs  | 
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