PSM maintenance; didn't go thru full ci.
To build the bundle, after yarn build as usual:
~/projects/agoric-sdk/packages/inter-protocol$ yarn bundle-source --elide-comments --cache-json ./bundles/ src/psm/psm.js psm
yarn run v1.22.22
$ /home/connolly/projects/agoric-sdk/node_modules/.bin/bundle-source --elide-comments --cache-json ./bundles/ src/psm/psm.js psm
Done in 1.92s.