Unsafe lifecycle methods were found within a strict-mode tree

[nicubarbaros]

componentWillMount: Please update the following components to use componentDidMount instead: ReactMeteorDataComponent

componentWillUpdate: Please update the following components to use componentDidUpdate instead: ReactMeteorDataComponent

Following errors with react 16.3 and above

[StorytellerCZ]

Same as #252

[StorytellerCZ]

Now these warning are visible outside of strict mode as well due to upcoming React 17.

[filipenevola]

closing because of react-meteor-data@2.0.0 #273