message: Write type safety as two words
diff: This package contains low-level cryptographic functionality used in other
  @cosmjs libraries. Little of it is implemented here, but mainly it is a curation
  -of external libraries along with correctness tests. We add type-safety, some
  +of external libraries along with correctness tests. We add type safety, some
  more checks, and a simple API to these libraries. This can also be freely
  imported outside of CosmJS based applications.
  