Doc tweaks. [ci skip]
Expose `slice`.
Add `chars` support to trim methods.
Avoid dynamic `keyPrefix` value.
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`.
Remove internal deps.
Use `breakIndicator` for the underscore build.
Tweak docs & remove unneeded args. [ci skip]
Reduce internal deps.
Continue to remove reps to fix builds.
Update `template` docs to mark `data` as optional. [ci skip]