Example has outdated parameters for caracal methods

[Alan-M-Thomaz]

The example in the read.me has outdated usage of Caracal methods.

tested replacing caracal-example by this code, fails with undefined method "keep_if" on line 1, because docx.font expect a hash of options.

[jdugan]

Since this is so small--and especially because you already have a test environment prepared--this is really the kind of request that is better submitted as a PR. :)

[Alan-M-Thomaz]

Ok, i will be doing it, when i get some free time.