Code out of date, no longer works

[jasonrhaas]

The npm install doesn't work, there are many packages that are out of date or no longer exist. I tried to upgrade everything to the latest packages, one by one, and am still getting errors when trying to do gulp --harmony to compile the code.

Any chance of getting some help getting this running? I know it's been a few years, I am willing to help with this, as is @dmaddox. I created a fork https://github.com/jasonrhaas/abtestcalculator/tree/modernize which has started the process.

The error I'm getting now is:

➜  abtestcalculator git:(master) ✗ gulp --harmony
[09:56:55] Node flags detected: --harmony
[09:56:55] Respawned to PID: 29354
assert.js:269
    throw err;
    ^

AssertionError [ERR_ASSERTION]: Task function must be specified
    at Gulp.set [as _setTask] (/Users/jhaas/repos/abtestcalculator/node_modules/undertaker/lib/set-task.js:10:3)
    at Gulp.task (/Users/jhaas/repos/abtestcalculator/node_modules/undertaker/lib/task.js:13:8)
    at Object.<anonymous> (/Users/jhaas/repos/abtestcalculator/gulpfile.js:40:6)
    at Module._compile (internal/modules/cjs/loader.js:702:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:713:10)
    at Module.load (internal/modules/cjs/loader.js:612:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:551:12)
    at Function.Module._load (internal/modules/cjs/loader.js:543:3)
    at Module.require (internal/modules/cjs/loader.js:650:17)
    at require (internal/modules/cjs/helpers.js:20:18)