Rendere vincolate alla specifica versione le dipendenze

[yoghi]

Using rake 12.0.0
Using i18n 0.8.6
Using minitest 5.10.2
Using thread_safe 0.3.6
Using public_suffix 2.0.5
Using coderay 1.1.1
Using colorator 1.1.0
Using fastimage 2.1.0
Using ffi 1.9.18
Using sass 3.4.25
Using forwardable-extended 2.6.0
Using rb-fsevent 0.10.2
Using kramdown 1.14.0
Using liquid 3.0.6
Using mercenary 0.3.6
Using rouge 1.11.1
Using safe_yaml 1.0.4
Using mini_magick 4.8.0
Using stringex 2.7.1
Using thor 0.19.4
Using bundler 1.12.0.pre.2
Using tzinfo 1.2.3
Using addressable 2.5.1
Using rb-inotify 0.9.10
Using font-awesome-sass 4.7.0
Using jekyll-sass-converter 1.5.0
Using pathutil 0.14.0
Using activesupport 4.2.9
Using listen 3.0.8
Using jekyll-watch 1.5.0
Using jekyll 3.3.0