Make the `support` checks in `shimKeys` consistent with `keysIn`.
Avoid `toObject` in the `shimKeys` path of `_.keys`.
Remove type check in `_.transform`.
Remove `toObject` use from `_.keysIn`.
Reduce deps in `baseIsEqual`,  `shimIsPlainObject`, `omit`, & `pick`.
Minor cleanup of `baseIsEqual`.
Add array chaining tests and fix `_#unshift`.
Rebuild dist.
Add `_.deburr`, `_.thru`, and `_.words` to the features section of the readme. [closes #709] [ci skip]