docs(README): minor grammatical fixes (#418)
docs(README): minor grammatical fixes (#418)


nbushak/postgraphql,calebmer/postgraphql,postgraphql/postgraphql,nbushak/postgraphql,postgraphql/postgraphql,nbushak/postgraphql,calebmer/postgraphql,calebmer/postgraphql,nbushak/postgraphql,postgraphql/postgraphql,postgraphql/postgraphql,calebmer/postgraphql