Add '/usr/local/bin/' to remix's path on OSX so it can find npx.

[TheRook]

This is a pretty stright forward fix. OSX users need '/usr/local/bin/' because '/usr/local/bin/npx' is going to be the path 99.999999999999999999999% of the time.

If for whatever reason you don't like this solution you need to allow the user to update the PATH variable with a config option AND also, take the PATH variable from the caller's environment. But that is more difficult than just looking for npx in the place it is installed on every mac on the planet.

Any of these solutions will fix:
[Hardhat Compilation]: /bin/sh: npx: command not found

[TheRook]

If you are going to tell me that it isn't installed in '/usr/local/bin/npx' - your wrong. And looking for a binary in this path hurts nothing, not looking for it impact every mac user. Don't be that dick, just look for the binary where it is installed.

[bunsenstraat]

Don't be that dick, just look for the binary where it is installed.

Please remain polite on our repo.