feat: bump web3 from 0.2.0 to 1.2.2

[fmiras]

The main approach of this PR was to upgrade to the latest version of web3 without forcing a major release of decentraland-eth.

Summary:

• Removed most of promisify() modifiers since now is natively supported by Web3
• Changed whole implementation of deployContracts() helper function
• Reimplemented wallet.createContractInstance() with new contract instantiation web3 methods
• Fixed some method signatures (some of them had missing return types or comments)
• Adjusted tests payloads to use new web3 Tx receipts (without changing any expected values)
• Start using Web3Type example here
• Change sendCall and sendTransactions methods to new implementation (and "byType" alternative respectively
• Use new Events implementation

Caveats/Pending Tasks:

• watch event methods is now using a workaround to keep supporting toBlock since is not supported anymore by web3 (see here)
• Watch/Get events by type is NOT implemented yet because MANAToken (the already automated contract tests) "Mint" event doesn't have a same-name event case.
• Try this new decentraland-eth version with at least one DCL Dapp.