Show stacktrace for unsafe delegatecall/selfdestruct errors

[ericglau]

If a contract directly or indirectly depends on some code that has a delegatecall or selfdestruct, the plugin gives an error like:

 Error: Contract `contracts/MyContract.sol:MyContract` is not upgrade safe

@openzeppelin/contracts/utils/Address.sol:191: Use of delegatecall is not allowed
    https://zpl.in/upgrades/error-002

It would be helpful to show a stacktrace including the line in MyContract and intermediate contracts that led to the unsafe code, so that the user can determine if they should fix the issue or add an ignore annotation.