[BUG] K&R brace style config still uses Allman brace style

[BWindey]

When passing a config file with the option:

brace_style: K&R

c3fmt still formats with Allman braces.

I confirmed that the config file gets used by changing the settings for tabs and indent width.

Installed version:

c3fmt version:          0.2.3
target c3c version:     0.7.11

[BWindey]

I tried my hand at implementing this myself, and it kinda works but there is an issue with structs, enums and unions where it places a double space behind the typename:

struct Foo  {
    int a;
}

If you're interested, here are the changes I made:
BWindey@171025f
BWindey@6ab2af6#diff-2b3ea1664267a3b741a1b964d5eeb3f941017e0e5e8ff9c2fe7c44ac6ce6ef46R1900

[ManuLinares]

@BWindey could you try this PR #16 and see if in your own testing K&R works as expected?

Thanks.

[BWindey]

Tried the 0.8.x branch out on some examples and seems to be working as expected, thank you for implementing this!