bip39

Cut v2.2.2 to fix docs.rs breakage

• Fix docs.rs builds (#101)

Cut a v2.2.1 patch release

• Bump bitcoin_hashes dependency to v0.14.0 (#76)
• Redact Debug output of Mnemonic (#93)
• Disable default features for optional zeroize dependency (#94)

• Unpin unicode-normalization version

• Add support for Portuguese as per addition to BIP.
• Add constant Language::ALL and deprecate Language::all()
• Add Mnemonic::words and deprecate Mnemonic::word_iter
• Add Mnemonic::word_indices
• Use rand_core if rand feature is not set
• Add alloc feature to gate unicode-normalization

• Set Rust edition to 2018
• Make rand and rand_core dependencies more flexible
  • Increase maximum version in constraint
  • Make rand_core optional too
  • Expose both crates
• Bump MSRV to 1.41.1

• Add Mnemonic::parse_in_normalized_without_checksum_check
• Make public Mnemonic::normalize_utf8_cow

• Add zerioze support through a feature (MSRV 1.51)
• Allow word count multiples of 3 instead of 6
• Add support for no-std usage
• Expose Language::word_list and Language::find_word methods

• Add Mnemonic::language getter.
• Make Mnemonic::language_of static method public.
• Change internal representation of Mnemonic, making it slightly smaller.

• Initial version of entire rewrite.