Disable unneeded features of the petgraph library. (#82)
Disable unneeded features of the petgraph library. (#82)

This drops the `ordermap` dependency, for example.

Contributed on behalf of Buoyant, Inc.

Signed-off-by: Brian Smith <760e7dab2836853c63805033e514668301fa9c47@briansmith.org>
danburkert/prost,danburkert/prost