error-tree 0.6.0

This crate let's us use the `error_tree!` proc macro for ergonomic error hierarchy definition
Documentation
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pub(crate) use std::hash::{Hash,Hasher};
pub(crate) use export_magic::*;
pub(crate) use derive_error::*;
pub(crate) use std::collections::{VecDeque,HashMap,HashSet};
pub(crate) use proc_macro::TokenStream;
pub(crate) use syn::{parse_quote,Ident, TypePath, parse_macro_input, parse::{Parse, ParseStream}, Type };
pub(crate) use quote::{format_ident,ToTokens,quote};
pub(crate) use proc_macro2::TokenStream as TokenStream2;
pub(crate) use syn::{Attribute,braced,parse2, Result as SynResult, Token};
pub(crate) use syn::punctuated::Punctuated;