Fix for invalid JSON data :hammer:

[MarketingPip]

This PR will NOW close issue #246.

Throwing / handling this error.

Un-handled Errors:

/node_modules/wtf_wikipedia/src/_fetch/index.js:71:18
TypeError: Cannot convert undefined or null to object

Same as before, but should pass build testing :blush: - my bad.

[spencermountain]

nice! thanks