contract bundle too large when built from npm

[dckc]

In #2 , I'm trying to get dependencies from npm instead of from a linked agoric-sdk (using agoric install). It works for testing, but it produces a contract bundle around 4.5mb -- in particular, >1mb when compressed, so we get Invalid Request: error reading request body: http: request body too large.

Lots of modules are duplicated. promise-kit is duplicated about 15 times. Most likely due to...

• bundle contains duplicated modules based on duplicated packages in node_modules Agoric/agoric-sdk#8621

work-around:
if delete all the node_modules directories and agoric install from the top dir and then build the bundle, I get something 1.6M

for some details, see https://github.com/agoric-labs/dapp-swaparoo/releases/tag/v0.1.1-alpha

[dckc]

fixed in #5