fix "missing API key" exception in passport-steam

Got the following exception: 

```
Error: invalid or missing API key
    at new steam (/var/www/forum/nodebb-dev/node_modules/nodebb-plugin-sso-steam/node_modules/passport-steam/node_modules/steam-web/lib/steam.js:20:80)
    at new Strategy (/var/www/forum/nodebb-dev/node_modules/nodebb-plugin-sso-steam/node_modules/passport-steam/lib/passport-steam/strategy.js:49:17)
    at Object.Steam.getStrategy (/var/www/forum/nodebb-dev/node_modules/nodebb-plugin-sso-steam/library.js:37:20)
    at /var/www/forum/nodebb-dev/src/plugins.js:377:32
    at /var/www/forum/nodebb-dev/node_modules/async/lib/async.js:272:13
    at iterate (/var/www/forum/nodebb-dev/node_modules/async/lib/async.js:149:13)
    at Object.async.eachSeries (/var/www/forum/nodebb-dev/node_modules/async/lib/async.js:165:9)
    at Object.async.reduce (/var/www/forum/nodebb-dev/node_modules/async/lib/async.js:271:15)
    at Object.Plugins.fireHook (/var/www/forum/nodebb-dev/src/plugins.js:371:12)
    at /var/www/forum/nodebb-dev/src/routes/authentication.js:140:12

```

passport-steam wants to have the apikey in its options parameter since https://github.com/liamcurry/passport-steam/commit/c872805826e5e72f7548bb2e532ec86dec995654 , unless you specify `profile:false`
Merge pull request #12 from Fusselwurm/patch-2

fix "missing API key" exception in passport-steam