Merge pull request tendermint#3712 from tendermint/release/v0.31.7

Release/v0.31.7

Merge pull request tendermint#3695 from tendermint/release/v0.31.6

Release/v0.31.6

Merge pull request tendermint#3568 from tendermint/anton/release-v0.31.5

v0.31.5 changelog and version updates

Merge pull request tendermint#3570 from tendermint/ismail/backport-re…

…lease/v0.30.4

Release/v0.30.4

Merge pull request tendermint#3548 from tendermint/release/v0.31.4

Release/v0.31.4

Fixes tendermint#3439

* make sure we create valid private keys:

 - genPrivKey samples and rejects invalid fieldelems (like libsecp256k1)
 - GenPrivKeySecp256k1 uses `(sha(secret) mod (n − 1)) + 1`
 - fix typo, rename test file: s/secpk256k1/secp256k1/

* Update crypto/secp256k1/secp256k1.go

Merge pull request tendermint#3525 from tendermint/release/v0.31.3

Release/v0.31.3

Merge pull request tendermint#3526 from tendermint/release/v0.30.3

Release/v0.30.3

Merge pull request tendermint#3518 from tendermint/prepare-release-v0…

….31.2

Release v0.31.2

changelog