vendors/execa.js/load2
      load = function load2() {
        if (loaded || !processOk(global.process)) {
          return;
        }
        loaded = true;
        emitter.count += 1;
        signals = signals.filter(function(sig) {
          try {
            process4.on(sig, sigListeners[sig]);
            return true;
          } catch (er) {
            return false;
          }
        });
        process4.emit = processEmit;
        process4.reallyExit = processReallyExit;
      };