Fixed broken web3 dependency

[dylanseago]

Upgraded web3 to ^0.19.1 and web3-provider-engine to ~13.0.0 to fix #332

Tests still need to be fixed.

[historiographist]

thanks for this, but it seems this is failing tests for a reason. even with these upgraded deps, i'm still getting errors when i run contracts, a la "TypeError: self.engine._fetchBlock is not a function" (as in the failed tests)

[dylanseago]

@drkhaira Thanks for noting that. There are definitely things that need to be fixed to support the upgrade, this PR should just be used as a starting point for resolving the issues caused by web3/web3.js#904

[tcoulter]

Hi there. Thanks for the PR.

This PR does two things: Upgrades web3 and upgrades the provider engine. Upgrading the provider engine should be a separate issue tackled at a separate time (although for the error you mentioned, bignumber.js, updating the provider engine might be required). I've updated web3 on the release branch of trufflesuite/ganache-core, which is now the core of the TestRPC. We'll update the provider engine in a future ticket.

Thanks!