Summary:
This re-packages the build for the internal APIs exposed under #1526 to
be more browser-friendly. Removing `target: "node"` (and adding an
explicit `globalObject: "this"` for best-effort cross-compatibility) is
the biggest change from the backend build; removing all the extra
loaders and static site generation is the biggest change from the
frontend build.
This build configuration is forked from `webpack.config.backend.js`.
Test Plan:
Run `yarn api`, then upload the contents of `dist/api.js` to an
Observable notebook and require it as an ES module. Verify that the
SourceCred APIs are exposed: e.g., `sourcecred.core.graph.Graph` should
be a valid constructor.
wchargin-branch: api-build
William Chargin