Fix eslint to properly detect brace-less one-line if

The current config was changed to allow
brace-less one-line if, which are not allowed in the guidelines:

```
if (fooo) do_something();
```

Issue: GDL-10

Author: francoisferrand

index.js

@@ -93,7 +93,7 @@ module.exports = {
             2,
             'always'
         ],
-        'curly': 1,
+        'curly': [1, 'all'],
         'no-mixed-spaces-and-tabs': 2,
         'max-len': [
             2,