UnicodeFuzzySearch: Add parenthesis around the function call.

`chr` or `hex` was eating up everything in the function and treating them all as parameters. Because of that, it results into:

```perl
{
    symbol => "...",
}
```

Instead of:

```perl
{
    symbol => "...",
    code => "...",
    name => "...",
}
```

lib/DDG/Goodie/UnicodeFuzzySearch.pm

@@ -43,7 +43,7 @@ handle remainder => sub {
 
     @matches = map {
         (my $code, my $name) = split /;/;
-        {symbol => chr hex $code,
+        {symbol => chr(hex($code)),
          code => $code,
          name => $name};
     } @matches;