With this commit 704ff4cc3a64c3579e2bafc412fa83da637fb122 and switching all the dependencies to be ~>3.1 instead >=3.1, this effectively dropped support for Rails 4 from this version.
Fetching gem metadata from https://rubygems.org/........
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
Bundler could not find compatible versions for gem "railties":
In Gemfile:
twitter-bootstrap-rails (= 3.2.1) ruby depends on
railties (~> 3.1) ruby
meta_request (= 0.2.8) ruby depends on
railties (4.1.1)
With this commit 704ff4cc3a64c3579e2bafc412fa83da637fb122 and switching all the dependencies to be
~>3.1
instead>=3.1
, this effectively dropped support for Rails 4 from this version.