Add query-string in the list of issues detected

README.md

@@ -488,3 +488,13 @@ fc.assert(
 leftPad('a\u{1f431}b', 4, 'x') //=> 'a\u{1f431}b'  -- in: 3 code points, out: 3 code points
 leftPad('abc', 4, '\u{1f431}') //=> '\u{1f431}abc' -- in: 3 code points, out: 4 code points
 ```
+
+### [query-string](https://github.com/sindresorhus/query-string)
+
+**Issue detected:** enabling the `bracket` setting when exporting arrays containing null values produces an invalid output for the parser \[[more](https://github.com/sindresorhus/query-string/pull/138)\]
+
+**Code example:**
+```js
+m.stringify({bar: ['a', null, 'b']}, {arrayFormat: 'bracket'}) //=> "bar[]=a&bar&bar[]=b"
+m.parse('bar[]=a&bar&bar[]=b', {arrayFormat: 'bracket'})       //=> {bar: [null, 'b']}
+```