Add `_.deburr` and `_.words` tests.
Minor whitespace nit. [ci skip]
Ensure `_.trunc` and `_.words` work as a callback for methods like `_.map`
Add `isIterateeCall` and make more methods support being used as a callback for methods like `_.map`.
Minor code format tweak for `_.isBoolean`, `_.isElement`, `_.isNumber`, and `_.isString`.
Minor source tweak of `_.template`.
Rebuild dist.