Update gems

Gemfile.lock

@@ -62,7 +62,7 @@ GEM
       libyajl2 (~> 1.2)
     fluent-logger (0.5.1)
       msgpack (>= 0.4.4, < 0.6.0, != 0.5.3, != 0.5.2, != 0.5.1, != 0.5.0)
-    foreman (0.81.0)
+    foreman (0.82.0)
       thor (~> 0.19.1)
     gqtp (1.0.6)
     grn2drn (1.0.5)
@@ -88,8 +88,7 @@ GEM
     mail (2.6.4)
       mime-types (>= 1.16, < 4)
     metaclass (0.0.4)
-    mime-types (2.99.1)
-    mime-types-data (3.2016.0221)
+    mime-types (2.99.2)
     mini_portile2 (2.0.0)
     minitest (5.9.0)
     mocha (1.1.0)
@@ -146,7 +145,7 @@ GEM
       rack (>= 1.0)
     rake (11.1.2)
     rchardet (1.6.1)
-    rroonga (6.0.0)
+    rroonga (6.0.2)
       archive-zip
       groonga-client (>= 0.0.3)
       json
@@ -165,7 +164,7 @@ GEM
       tilt (>= 1.3, < 3)
     slop (3.6.0)
     sys-proctable (1.0.0)
-    test-unit (3.1.8)
+    test-unit (3.1.9)
       power_assert
     test-unit-capybara (1.0.5)
       capybara (>= 2.1.0)
@@ -201,4 +200,4 @@ DEPENDENCIES
   test-unit-capybara
 
 BUNDLED WITH
-   1.12.3
+   1.12.4