* Update changelog.
* Fix typos.
* Remove 'by default' from packed encoding rule.
* Further specify longer requirement.
* Clarify that bool must have value of 1 if included.
* Fix typo variant -> varint.
* Disambiguate rule 3.
* Add more reasoning for requirements on zeroes.
* Reword rules to make bit restrictions clearer. Add exception for negative int32.
* Add reference for signed integer encoding.
* Clarify rule for signed int requirement.
* Deterministic -> bijective.
* Normalize spacing in 'protobuf 3'.
* Add background to clarify 70 bits.
* Fix nit: all -> most.
* Clarify is -> must.
Co-authored-by: Alessio Treglia <alessio@tendermint.com>
John Adler
