Add options for rule 'no-unused-vars' to check all arguments in functions (fixes #728)
update to latest Optionator

allows for multiple flags to array,
update env flag documentation to reflect this

closes #773
Merge pull request #774 from gkz/optionator-update

Update to latest Optionator
Merge pull request #771 from roadhump/issue_728

Add options for 'no-unused-vars' to check all arguments in functions (fixes #728)
Rule: valid-typeof

For a vast majority of use-cases, the only valid results of the `typeof` operator will be one of the following: `"undefined"`, `"object"`, `"boolean"`, `"number"`, `"string"`, and `"function"`. When a user compares the result of a `typeof` operation against a string that is not one of these strings, it is usually a typo. This rule ensures that when the result of a `typeof` operation is compared against a string, that string is in the aforementioned set.

    typeof foo === "strnig"

Fixes #715