moment.js deprecation warning

[smashwilson]

This isn't fatal, but it's another stacktrace I'm seeing in the presenter logs.

Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: Deprecation warning: moment construction falls back to js Date. This is discouraged and will be removed in upcoming major re
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: Error
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at deprecate (/usr/src/app/node_modules/moment/moment.js:738:42)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at /usr/src/app/node_modules/moment/moment.js:826:50
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at /usr/src/app/node_modules/moment/moment.js:8:85
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Object.<anonymous> (/usr/src/app/node_modules/moment/moment.js:11:2)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Module._compile (module.js:460:26)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Object.Module._extensions..js (module.js:478:10)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Module.load (module.js:355:32)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Function.Module._load (module.js:310:12)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at Module.require (module.js:365:17)
Jul 04 12:52:09 deconst-worker-drc-blue-001 systemd-docker[1056]: at require (module.js:384:17)

[ktbartholomew]

Yeah, it seems that dates come out of Jekyll as strings. We can do our own new Date(jekyllDateString) to avoid the deprecation warning, but that's basically the same thing moment.js is doing on its own.