[api] revert rubygem updates happened by accident

src/api/Gemfile

@@ -103,7 +103,7 @@ group :assets do
   # for minifying CSS
   gem 'cssmin', '>= 1.0.2'
   # for minifying JavaScript
-  gem 'uglifier', '>= 2.7.2'
+  gem 'uglifier', '>= 1.2.2'
   # to use sass in the asset pipeline
   gem 'sass-rails', '4.0.5'
   # assets for jQuery DataTables

src/api/Gemfile.lock

@@ -67,7 +67,7 @@ GEM
     docile (1.1.5)
     erubis (2.7.0)
     escape_utils (1.0.1)
-    execjs (2.6.0)
+    execjs (2.2.2)
     faker (1.4.3)
       i18n (~> 0.5)
     flog (4.3.0)
@@ -110,7 +110,7 @@ GEM
     multi_json (1.10.1)
     mysql2 (0.3.16)
     nokogiri (1.6.7.2)
-      mini_portile2 (~> 2.0.0.rc2)
+      mini_portile2 (~> 2.0.0)
     nokogumbo (1.4.1)
       nokogiri
     pkg-config (1.1.5)
@@ -159,6 +159,7 @@ GEM
     safe_yaml (1.0.4)
     sanitize (4.0.0)
       crass (~> 1.0.2)
+      nokogiri (>= 1.4.4)
       nokogumbo (= 1.4.1)
     sass (3.2.19)
     sass-rails (4.0.5)
@@ -198,8 +199,9 @@ GEM
     timecop (0.7.1)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    uglifier (3.0.0)
-      execjs (>= 0.3.0, < 3)
+    uglifier (2.5.3)
+      execjs (>= 0.3.0)
+      json (>= 1.8.0)
     unicorn (4.8.3)
       kgio (~> 2.6)
       rack
@@ -265,7 +267,7 @@ DEPENDENCIES
   thinking-sphinx (> 3.1)
   tilt (>= 1.4.1)
   timecop
-  uglifier (>= 2.7.2)
+  uglifier (>= 1.2.2)
   unicorn-rails
   webmock (>= 1.18.0)
   xmlhash (>= 1.3.6)