Doc tweaks. [ci skip]
Expose `slice`.
Add `chars` support to trim methods.
Avoid dynamic `keyPrefix` value.
Add doc note about not setting the resulting functions `length` for `bindAll` and `curry`. [ci skip]
Ensure `shimIsPlainObjects` returns `true` for plain objects with a `constructor` property that has a function value.
Make `isEqual` work with plain objects containing `constructor` properties.
Make `_.invert` assign arrays when using the `multiValue` flag.
Make checks for `map` and `reduce` use consistent with `indexTypes`.