Fix typo in readme. (#84)

Author: jonathanzopes

README.md

@@ -60,7 +60,7 @@ comment. To make these files strict too, just remove its' ignore comments.
 
 ## Configuration
 
-Plugin takes extra, non-mandatory arguments `paths`, `exlude` and `excludePattern`. Args `paths` and
+Plugin takes extra, non-mandatory arguments `paths`, `exclude` and `excludePattern`. Args `paths` and
 `exclude` accept an array of relative or absolute paths that should be included (property `paths`)
 or excluded (property `exclude`). Arg `excludePattern` accepts an array of strings that will be
 matched with [minimatch](https://github.com/isaacs/minimatch). To add strict mode to files from