Fix import to require
Fix import to require

Looks like ci is failing with `SyntaxError: Cannot use import statement outside a module`. I don't think this would happen when we are on typescript with a proper build pipeline, but for now changing to `require` might be easiest.
ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereum/ethereumjs-vm,ethereumjs/ethereumjs-vm,ethereumjs/ethereumjs-vm