Update language-configuration.json

A simple change allowing the user to surround selected code in spaces so instead of being stuck surrounding things tightly spaces can be used. i.e.:

```coffeescript
import {subobject} from 'somelibrary'
```

can quickly become:

```coffeescript
import { subobject } from 'somelibrary'
```

extensions/coffeescript/language-configuration.json

@@ -20,7 +20,8 @@
 		["[", "]"],
 		["(", ")"],
 		["\"", "\""],
-		["'", "'"]
+		["'", "'"],
+		[" ", " "]
 	],
 	"folding": {
 		"offSide": true,