#3308)

…tion. [closes #3260]

…loses #2983]

PR: #3704

To fix https://github.com/lodash/lodash/issues/3359, modified reHasUnicodeWord to remove an unnecessary comma which made the regex greedy, this is only a test regex and not a matching regex. Added unit tests, this now should run under 5 ms instead of over 1000 ms for huge 50k+ char words.

#3440]

…closes #3951]

This reverts commit 39a7eae.

…#4230)

Summary:
If the first values encountered in the `object` in mergeWith are not objects, `stack` is undefined when passed to the `customizer`. Once the first object-ish value is encountered, `stack` gets initialized, and all further calls to `customizer` include a defined `stack`. This PR makes `stack` always defined, even before the first object-ish value is encountered.

* Round Infinity with a precision argument returns Infinity

* Also making sure this is true for -Infinity
* Tested with _.round(), _.floor() and _.ceil()

* Switch to using isFinite to check if number should be rounded

* Add tests for rounding NaN now that there is an isFinite check

…247]

…#4355)

…l string (#4230)"

This reverts commit 7084300.

…#4467)

Closes #5085.

…t strings

This prevents potential ReDoS attacks using `_.toNumber` and `_.trim*`
as potential attack vectors.

Closes #5065.