Yarn add bundle-source cannot resolve dependencies

[mhofman]

Steps to reproduce

1. cd packages/bundle-source && yarn pack
2. In empty folder: yarn init, (enter) all prompts
3. yarn add path/to/endo/packages/bundle-source/endo-bundle-source-v2.0.7.tgz

At this point yarn requires resolutions for some dependencies. This is because @agoric/babel-regenerator (as published from https://github.com/agoric-labs/babel/commits/Agoric) has broken dependencies with apparently a template that wasn't removed.

See https://github.com/endojs/endo/pull/1096/files#r817130551

[kriskowal]

I’ve upgraded @agoric/bundle-source to v7.17.4 in #1098 per @michaelfig’s fix, and verified that these steps work now.