5.2.1: fixes typo in the example of "backslash hash", related to #83

Author: kaelzhang

README.md

@@ -136,7 +136,7 @@ Notice that a line starting with `'#'`(hash) is treated as a comment. Put a back
 
 ```js
 ignore().add('#abc').ignores('#abc')    // false
-ignore().add('\#abc').ignores('#abc')   // true
+ignore().add('\\#abc').ignores('#abc')   // true
 ```
 
 `pattern` could either be a line of ignore pattern or a string of multiple ignore patterns, which means we could just `ignore().add()` the content of a ignore file:

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ignore",
-  "version": "5.2.0",
+  "version": "5.2.1",
   "description": "Ignore is a manager and filter for .gitignore rules, the one used by eslint, gitbook and many others.",
   "files": [
     "legacy.js",