Downgrade 'grunt-exec' to 1.0.1 (again)
Downgrade 'grunt-exec' to 1.0.1 (again)

See 54c0ab6cc9cf34a21661779bcdb088a11d661f4f for rationale.
Reverts part of 9c1dedc138ac9fe2677aa1e273a77bad7a00bd03.

Change-Id: Ibc3a718f5868121474630c255cdffba8c60dad0a

wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui,wikimedia/oojs-ui