Update gems.

Gemfile.lock

@@ -1,22 +1,22 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.2.1)
+    activesupport (5.2.3)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     addressable (2.6.0)
       public_suffix (>= 2.0.2, < 4.0)
-    airbrake (8.3.2)
-      airbrake-ruby (~> 4.1)
-    airbrake-ruby (4.2.1)
+    airbrake (9.1.0)
+      airbrake-ruby (~> 4.2)
+    airbrake-ruby (4.2.5)
       rbtree3 (~> 0.5)
-    backports (3.12.0)
+    backports (3.13.0)
     coderay (1.1.2)
     concurrent-ruby (1.1.5)
     crass (1.0.4)
-    dotenv (2.7.1)
+    dotenv (2.7.2)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
     faraday_middleware (0.13.1)
@@ -41,8 +41,8 @@ GEM
     multi_json (1.13.1)
     multipart-post (2.0.0)
     mustermann (1.0.3)
-    newrelic_rpm (6.1.0.352)
-    nokogiri (1.10.1)
+    newrelic_rpm (6.2.0.354)
+    nokogiri (1.10.2)
       mini_portile2 (~> 2.4.0)
     opengraph_parser (0.2.3)
       addressable
@@ -58,9 +58,9 @@ GEM
       pry (~> 0.9)
       slop (~> 3.0)
     public_suffix (3.0.3)
-    puma (3.12.0)
+    puma (3.12.1)
     quantile (0.2.1)
-    rack (2.0.6)
+    rack (2.0.7)
     rack-protection (2.0.5)
       rack
     rack-ssl-enforcer (0.2.9)