sponsorship: update sponsors for April 🙏 (#1034)
sponsorship: update sponsors for April 🙏 (#1034)

Thank you to everyone who sponsors PostGraphile!
calebmer/postgraphql,calebmer/postgraphql,postgraphql/postgraphql,calebmer/postgraphql,postgraphql/postgraphql,calebmer/postgraphql,postgraphql/postgraphql,postgraphql/postgraphql