Update to lodash v4.2.0.

[jdalton]

This closes #1346.

[stoeffel]

How about including lodash.isPlainObject instead of the complete lodash?

[gaearon]

@stoeffel It doesn't really matter because we import just that module.

[stoeffel]

Agreed.
We're not using redux directly, but we use react-dnd.
We depend on react-dnd with a fixed dependency, but react-dnd depends on dnd-core (not fixed) and dnd-core depends on redux (not fixed).
Our webpack was configured to alias lodash to one global lodash, I guess the intention behind that was to reduce client-size. This led to a failing build because we are still using lodash v3, which wouldn't have happened if redux would use lodash.isPlainObject or the dependencies in dnd-core and react-dnd were fixed.
But IMO we need to change that anyway, because other libs will probably update to lodash v4 soon.

[gaearon]

Yes, that's a big assumption to make.
Wanna send a PR to update Lodash in DnD?

[stoeffel]

Wanna send a PR to update Lodash in DnD?

Will try to find some time to create a PR, but maybe someone will be faster.