Update gems.

Gemfile.lock

@@ -155,7 +155,7 @@ GEM
       railties (>= 3.2, < 6.1)
     equalizer (0.0.11)
     erubi (1.8.0)
-    factory_bot (5.0.2)
+    factory_bot (5.1.0)
       activesupport (>= 4.2.0)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
@@ -194,7 +194,7 @@ GEM
       domain_name (~> 0.5)
     http-form_data (2.1.1)
     http_parser.rb (0.6.0)
-    httparty (0.17.0)
+    httparty (0.17.1)
       mime-types (~> 3.0)
       multi_xml (>= 0.5.2)
     httpclient (2.8.3)
@@ -248,7 +248,7 @@ GEM
     mimemagic (0.3.3)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
-    minitest (5.11.3)
+    minitest (5.12.0)
     minitest-ci (3.4.0)
       minitest (>= 5.0.6)
     mocha (1.9.0)
@@ -346,7 +346,7 @@ GEM
       ffi (~> 1.0)
     recaptcha (5.1.0)
       json
-    redis (4.1.2)
+    redis (4.1.3)
     regexp_parser (1.6.0)
     representable (2.3.0)
       uber (~> 0.0.7)
@@ -380,7 +380,7 @@ GEM
       actionpack (>= 5.0)
       activemodel (>= 5.0)
     simple_oauth (0.3.1)
-    simplecov (0.17.0)
+    simplecov (0.17.1)
       docile (~> 1.1)
       json (>= 1.8, < 3)
       simplecov-html (~> 0.10.0)
@@ -437,7 +437,7 @@ GEM
     unicorn-worker-killer (0.4.4)
       get_process_mem (~> 0)
       unicorn (>= 4, < 6)
-    webmock (3.7.4)
+    webmock (3.7.5)
       addressable (>= 2.3.6)
       crack (>= 0.3.2)
       hashdiff (>= 0.4.0, < 2.0.0)