Bump version to 7.2.21

CHANGELOG

+v 7.2.21
+  - Add checks if blob is a lfs pointer, values for size and oid.
+
 v 7.2.20
   - Switch back to GitHub Linguist and bump rugged and other gem versions
   - Add method on repository to create branch

Gemfile.lock

 PATH
   remote: .
   specs:
-    gitlab_git (7.2.20)
+    gitlab_git (7.2.21)
       activesupport (~> 4.0)
       charlock_holmes (~> 0.7.3)
       github-linguist (~> 4.7.0)
@@ -10,7 +10,7 @@ PATH
 GEM
   remote: http://rubygems.org/
   specs:
-    activesupport (4.2.4)
+    activesupport (4.2.5)
       i18n (~> 0.7)
       json (~> 1.7, >= 1.7.7)
       minitest (~> 5.1)
@@ -35,7 +35,7 @@ GEM
     escape_utils (1.1.0)
     ffi (1.8.1)
     formatador (0.2.4)
-    github-linguist (4.7.0)
+    github-linguist (4.7.2)
       charlock_holmes (~> 0.7.3)
       escape_utils (~> 1.1.0)
       mime-types (>= 1.19)
@@ -58,7 +58,7 @@ GEM
     lumberjack (1.0.3)
     method_source (0.8.1)
     mime-types (1.25.1)
-    minitest (5.8.2)
+    minitest (5.8.3)
     multi_json (1.10.1)
     parser (2.2.0.2)
       ast (>= 1.1, < 3.0)
@@ -121,3 +121,6 @@ DEPENDENCIES
   rubocop
   simplecov
   webmock
+
+BUNDLED WITH
+   1.10.6

VERSION

-7.2.20
+7.2.21