bundle update

Gemfile.lock

@@ -1,6 +1,6 @@
 GIT
   remote: https://github.com/citation-style-language/Sheldon.git
-  revision: 38b1c813448737261a43060ccd3669d67dbfcad7
+  revision: f5023127f062139c40e03617b230d827a6c16002
   specs:
     sheldon (1.0.30)
       citeproc-ruby
@@ -32,7 +32,7 @@ GEM
       rexml
     csl-styles (1.0.1.11)
       csl (~> 1.0)
-    diff-lcs (1.4.4)
+    diff-lcs (1.5.0)
     diffy (3.4.0)
     dotenv (2.7.6)
     erubis (2.7.0)
@@ -55,7 +55,7 @@ GEM
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
-    faraday_middleware (1.1.0)
+    faraday_middleware (1.2.0)
       faraday (~> 1.0)
     fuubar (2.5.1)
       rspec-core (~> 3.0)
@@ -71,11 +71,11 @@ GEM
     octokit (4.21.0)
       faraday (>= 0.9)
       sawyer (~> 0.8.0, >= 0.5.3)
-    ostruct (0.4.0)
+    ostruct (0.5.2)
     public_suffix (4.0.6)
-    racc (1.5.2)
+    racc (1.6.0)
     rake (13.0.6)
-    reverse_markdown (2.0.0)
+    reverse_markdown (2.1.1)
       nokogiri
     rexml (3.2.5)
     rspec (3.10.0)
@@ -90,7 +90,7 @@ GEM
     rspec-mocks (3.10.2)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.10.0)
-    rspec-support (3.10.2)
+    rspec-support (3.10.3)
     ruby-progressbar (1.11.0)
     ruby2_keywords (0.0.5)
     sawyer (0.8.2)