Merge 0.4.2 into master (pgcentralfoundation#523)

* update copyright headers (pgcentralfoundation#511)

* Add pg_operator.h (pgcentralfoundation#512)

* Add include for pg_operator.h

* Regenerate bindings

* Add Copy and Clone to the time_stamp_* types (pgcentralfoundation#509)

* Add from impls for pg_sys -> pgx timestamp* (pgcentralfoundation#510)

* Remove dead --workspace flag on cargo pgx test (pgcentralfoundation#520)

* Pass RUSTFLAGS to rustc on schema generate (pgcentralfoundation#513)

* Prepare 0.4.2 (pgcentralfoundation#522)

* upgrade dependencies

* bump version to v0.4.2

Co-authored-by: Einar <[email protected]>
Co-authored-by: James Sewell <[email protected]>
Co-authored-by: Ana Hobden <[email protected]>

Release 0.4.1 (pgcentralfoundation#508)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.4.0 (pgcentralfoundation#486)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.4.0-beta.0 (pgcentralfoundation#461)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.3.3 (pgcentralfoundation#445)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.3.2 (pgcentralfoundation#442)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.3.1 (pgcentralfoundation#435)

Signed-off-by: Ana Hobden <[email protected]>

Release 0.3.0 (pgcentralfoundation#431)

Signed-off-by: Ana Hobden <[email protected]>

bump version to 0.2.6

Merge branch 'develop' of github.com:zombodb/pgx into develop