Attach to non-fork ganache vm #391
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Adds logic to use an in-process ganache supplied by the dev platform's plugin API, falling back on ganache-core-sc (2.7.0) if that fails.
Because there is no official API at ganache yet exposing the vm step and because the vm is instantiated at ganache core launch and every time an eth_call is made, we attach in kind of a complicated (brittle?) way:
blockchain_double.createVMFromStateTrie(eth_call)provider.engine.manager.state.blockchain(eth_send)