Release v0.1.21 (pgcentralfoundation#133)

* update version in cargo-pgx' cargo_toml template

* cargo-pgx command output needs an additional space for padding/alignment

* upgrade dependencies

* fix binding function name warnings, revert hash32 dep to 0.1.1, update rust bindings as built on mac

Co-authored-by: Eric B. Ridge <[email protected]>

update bindings

should have been part of 4aca7d0

Merge branch 'master' into develop

Merge branch 'develop'

Merge branch 'develop'

properly parameterize this.

wow I hate dealing with CI stuff.

bump to v0.1.13