Lawrence Forman 682c07cb73
Add mtx tooling to @0x/protocol-utils (#90)
* `@0x/contracts-zero-ex`: Use the `MetaTransaction` class from `@0x/protocol-utils` in tests.

* `@0x/protocol-utils`: Add the `MetaTransaction` class for EP mtxs + refactors

* update changelogs

* `@0x/protocol-utils`: Add mtx tests

* `@0x/protocol-utils`: Rename `mtx.ts` to `meta_transactions.ts` and misc review feedback

Co-authored-by: Lawrence Forman <me@merklejerk.com>
2020-12-16 14:22:00 -05:00
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