Add support for large negative integers in msgpack encoding
This is to support some of the metadata imported from npm package.jsons in revisions.
Test Plan
tox test added
Migrated from D4568 (view on Phabricator)
Staging instance, all changes can be removed at any time
This is to support some of the metadata imported from npm package.jsons in revisions.
tox test added
Migrated from D4568 (view on Phabricator)