CI: Test ci-integratoin

.gitlab-ci.yml

+variables:
+        VERSION: "0.1.3"
+        
 stages:
     - setup-extras
     - make-extras
@@ -22,7 +25,7 @@ make-extras:
         stage: make-extras
         script: 
                 - gem build jekyll-scholar-extras.gemspec ; 
-                - gem install jekyll-scholar-extras-0.1.3.gem; 
+                - gem install jekyll-scholar-extras-$VERSION.gem; 
                 - cp -r samples/jekyll-template ~/; 
                 - cd ~/jekyll-template
                 - jekyll build --trace

jekyll-scholar-extras.gemspec

@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency('jekyll', '~> 3.0')
   s.add_runtime_dependency('jekyll-scholar', '~> 5.8')
   s.add_runtime_dependency('citeproc-ruby', '~> 1.0')
-  s.add_runtime_dependency('bibtex-ruby', '~> 4.0')
+  s.add_runtime_dependency('bibtex-ruby', '~> 4.0', '>=4.0.13')
 
   s.files        = `git ls-files`.split("\n")
   s.test_files   = `git ls-files -- {samples,test,spec,features}/*`.split("\n")