Update gems.

Gemfile.lock

@@ -1,16 +1,16 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.1.1)
+    activesupport (5.1.2)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (~> 0.7)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.5.1)
       public_suffix (~> 2.0, >= 2.0.2)
-    airbrake (6.1.2)
-      airbrake-ruby (~> 2.2, >= 2.2.5)
-    airbrake-ruby (2.2.7)
+    airbrake (6.2.1)
+      airbrake-ruby (~> 2.3, >= 2.3.1)
+    airbrake-ruby (2.3.2)
     backports (3.8.0)
     better_errors (2.1.1)
       coderay (>= 1.0.0)
@@ -25,9 +25,9 @@ GEM
     debug_inspector (0.0.3)
     dotenv (2.2.1)
     erubis (2.7.0)
-    faraday (0.12.1)
+    faraday (0.12.2)
       multipart-post (>= 1.2, < 3)
-    faraday_middleware (0.11.0.1)
+    faraday_middleware (0.12.0)
       faraday (>= 0.7.4, < 1.0)
     feedjira (2.1.2)
       faraday (>= 0.9)
@@ -37,19 +37,19 @@ GEM
     github-release-party (0.1.1)
       httparty (~> 0.13)
     heroku-env (0.1.4)
-    httparty (0.15.5)
+    httparty (0.15.6)
       multi_xml (>= 0.5.2)
-    i18n (0.8.4)
+    i18n (0.8.6)
     loofah (2.0.3)
       nokogiri (>= 1.5.9)
     method_source (0.8.2)
     mini_portile2 (2.2.0)
-    minitest (5.10.2)
+    minitest (5.10.3)
     multi_json (1.12.1)
     multi_xml (0.6.0)
     multipart-post (2.0.0)
     mustermann (1.0.0)
-    newrelic_rpm (4.2.0.334)
+    newrelic_rpm (4.3.0.335)
     nokogiri (1.8.0)
       mini_portile2 (~> 2.2.0)
     opengraph_parser (0.2.3)
@@ -75,7 +75,7 @@ GEM
     redis-namespace (1.5.3)
       redis (~> 3.0, >= 3.0.4)
     sax-machine (1.3.2)
-    secure_headers (3.6.5)
+    secure_headers (3.6.7)
       useragent
     sinatra (2.0.0)
       mustermann (~> 1.0)
@@ -94,7 +94,7 @@ GEM
     slop (3.6.0)
     thor (0.19.4)
     thread_safe (0.3.6)
-    tilt (2.0.7)
+    tilt (2.0.8)
     tzinfo (1.2.3)
       thread_safe (~> 0.1)
     useragent (0.16.8)