…rt (#2)

This commit does the following:
* updates deps
* updates solidity version from ^0.5.0 to ^0.8.20
* implements ERC721 functions for EtomicSwap contract
* adds ERC721 tests
* implements ERC1155 functions for EtomicSwap contract
* adds ERC1155 tests

#4

* add hardhat config, update deps and some tests, remove unnecessary files

* remove `connect(accounts)`, use `should.be` instead of `expect().to.be`

* remove `request`, `equest-promise-native`, `sol-merger` deps

* update setup dev commands

* use `connect` method instead of `from:address` as we use ethers V6

* update tests

* Beautify js code

* update readme and travis

* update readme (fix docker command), remove env

* call connect() when transfer NFTs

* use `rejectedWith` with a more specific error

* reduce duplication by contractRunner vars creation

* remove rpc.Dockerfile, update workspace.Dockerfile and hardhat.config

* use `to.be.rejectedWith` to match error message

* error messages in EtomicSwap.sol, format code

* update constants in tests

* split require statements

This Implements EtomicSwapV2 contract containing functions needed to support Trading Protocol Upgrade V2.