language: ruby

rvm:
- ruby-head
- 2.4.0
- 2.3.3
- 2.2.6
- 2.1.10
addons:
  apt_packages:
    libmagic-dev
script:
  - bundle exec parallel_rspec spec

language: ruby

rvm:
- ruby-head
- 2.4.0
- 2.3.3
- 2.2.6
- 2.1.10

before_install:
  - gem update --system
addons:
  apt_packages:
    libmagic-dev
script:
  - bundle exec parallel_rspec spec

Fix build problem with rubygems
Fix build problem with rubygems

Error `can't modify frozen String`
See
https://github.com/sickill/rainbow/issues/48
