1) Check depositor when burning ERC721 tokens  (#687)

* burn fix

* Release v2.1.4

* Fix tests

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Co-authored-by: Kirill Pisarev <pisarevkir@gmail.com> (mpetrun5)
(SHA: b929c98)

burn fix

1) Add HandlerHelpers to package (#526) (nmlinaric)
(SHA: 8f1536e)

2) Relase v2.1.3 (#528) (nmlinaric)
(SHA: 2f29dd7)

1) Publish to npm registry (#517)

* Publish to npm registry

* Generate types for all contracts (nmlinaric)
(SHA: 3a5bce6)

2) Release v2.1.3 (#518) (nmlinaric)
(SHA: 2e6e24c)

1) Fix publishing package (#513) (nmlinaric)
(SHA: 82f16a4)

2) Relase v2.1.1 (#515) (nmlinaric)
(SHA: 8c069a2)

Relase v2.1.0 (#507)

Require token address to be a contract in erc20 handler (#463)

* check if the token address is a contract in erc20 handler
* modify revert reason

Anderson/add new forwarder contract (#440)

* add minimal forwarder

* rename test forwarder contract

* add tests for the new forwarder

* add forwarder test

* rename test

* fix comments

* fix comments

* remove responseForwarder

Add erc1155Handler, erc1155Safe, and modify HandlerHelpers (#416)

* add erc1155Handler, erc1155Safe, and modify HandlerHelpers

* update old version withdraw functions

* add using normal address in handler withdraw

* add comments

* modify withdraw test and add tests for erc1155

remove fund functions and add tests