Request with no callback results in error

[JacobReynolds]

The following request will cause an error, because there is no callback defined:

const Api = require('kubernetes-client');
const core = new Api.Core(Api.config.getInCluster());
core.namespaces(process.env.POD_NAMESPACE).pod(process.env.POD_NAME).patch({
  body: {
    metadata: {
      labels: {
        app: 'working'
      }
    }
  }
})

/usr/src/app/node_modules/kubernetes-client/lib/base.js:15
    cb(null, result.body);
    ^

TypeError: cb is not a function
    at /usr/src/app/node_modules/kubernetes-client/lib/base.js:15:5
    at Request.request [as _callback] (/usr/src/app/node_modules/kubernetes-client/lib/request.js:65:7)
    at Request.self.callback (/usr/src/app/node_modules/request/request.js:186:22)
    at emitTwo (events.js:126:13)
    at Request.emit (events.js:214:7)
    at Request.<anonymous> (/usr/src/app/node_modules/request/request.js:1163:10)
    at emitOne (events.js:116:13)
    at Request.emit (events.js:211:7)
    at IncomingMessage.<anonymous> (/usr/src/app/node_modules/request/request.js:1085:12)
    at Object.onceWrapper (events.js:313:30)
    at emitNone (events.js:111:20)
    at IncomingMessage.emit (events.js:208:7)
    at endReadableNT (_stream_readable.js:1055:12)
    at _combinedTickCallback (internal/process/next_tick.js:138:11)
    at process._tickCallback (internal/process/next_tick.js:180:9)

Would it be possible to just add a check here to see if a callback exists?

[silasbw]

Thanks @JacobReynolds. I implemented support in #193. It should get merged and published with a new major version in a couple of days.