Warning when building A-Frame physics system with node 16

[diarmidmackenzie]

Run npm run dist get this error:

node:35452) [DEP0128] DeprecationWarning: Invalid 'main' field in 'C:\Users\ASUS\Documents\GitHub\AframeCommunity\aframe-physics-system\node_modules\find-parent-dir\package.json' of 'find-parent-dir.js'. Please either fix that or report it to the module author
(Use node --trace-deprecation ... to show where the warning was created)

Seen with node v16.17.0

Looks as though upgrading 0.3.0 to 0.3.1 of find-parent-dir will fix this. I'll try and sort this out with a PR fairly soon.
thlorenz/find-parent-dir#5