provide a radix for parseInt in example

Author: bendrucker

readme.md

@@ -15,7 +15,7 @@ $ npm install --save postgres-array
 ```js
 var postgresArray = require('postgres-array')
 
-postgresArray.parse('{1,2,3}', parseInt);
+postgresArray.parse('{1,2,3}', (value) => parseInt(value, 10))
 //=> [1, 2, 3]
 ```