indexmap dependency is out of date

[OvermindDL1]

indexmap is up to version 2.0 now, petgraph in this projects current dependency is using 2.0, this is bringing in both indexmap 1.9.3 and 2.0.0 in the current project increasing code size and full compile-time.

Is there any chance the indexmap dependency can be updated to 2.0?

[cwfitzgerald]

The indexmap bump is already on trunk (#2426), will land in naga 0.14