Attempt to address peerDependencies woes

[benjie]

Attempting to address:

➤ YN0000: ┌ Resolution step
➤ YN0061: │ graphql@npm:16.1.0-experimental-stream-defer.6 is deprecated: The latest defer-stream changes are no longer being published under the experimental-stream-defer tag. Please use 17.0.0-alpha.2 or newer.
➤ YN0002: │ graphile-build-pg@npm:5.0.0-alpha.3 doesn't provide graphql (p3770e), requested by grafast
➤ YN0002: │ graphile-build-pg@npm:5.0.0-alpha.3 doesn't provide graphql (p86f27), requested by @dataplan/pg
➤ YN0002: │ graphile-build-pg@npm:5.0.0-alpha.3 doesn't provide graphql (p66dcc), requested by graphile-build
➤ YN0002: │ graphile-build-pg@npm:5.0.0-alpha.3 doesn't provide graphql (peed72), requested by graphile-export
➤ YN0002: │ graphile-build@npm:5.0.0-alpha.3 [356ad] doesn't provide pg-sql2 (p1ff17), requested by graphile-export
➤ YN0002: │ graphile-build@npm:5.0.0-alpha.3 [cf365] doesn't provide pg-sql2 (p5d23e), requested by graphile-export
➤ YN0002: │ postgraphile@npm:5.0.0-alpha.3 doesn't provide pg-sql2 (pa5068), requested by graphile-export
➤ YN0000: │ Some peer dependencies are incorrectly met; run yarn explain peer-requirements <hash> for details, where <hash> is the six-letter p-prefixed code
➤ YN0000: └ Completed in 1s 689ms