Update dependency activesupport to v5.2.4.3 [SECURITY]

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    activesupport (5.2.3)
+    activesupport (5.2.6)
       concurrent-ruby (~> 1.0, >= 1.0.2)
       i18n (>= 0.7, < 2)
       minitest (~> 5.1)
@@ -18,7 +18,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.1.5)
+    concurrent-ruby (1.1.9)
     daemons (1.3.1)
     erubi (1.9.0)
     ethon (0.12.0)
@@ -32,7 +32,7 @@ GEM
     html-pipeline (2.12.0)
       activesupport (>= 2)
       nokogiri (>= 1.4)
-    i18n (1.7.0)
+    i18n (1.8.10)
       concurrent-ruby (~> 1.0)
     image_optim (0.26.5)
       exifr (~> 1.2, >= 1.2.2)
@@ -47,7 +47,7 @@ GEM
     in_threads (1.5.3)
     method_source (0.9.2)
     mini_portile2 (2.4.0)
-    minitest (5.12.2)
+    minitest (5.14.4)
     multi_json (1.13.1)
     mustermann (1.0.3)
     net-sftp (3.0.0.beta1)
@@ -121,7 +121,7 @@ GEM
     tty-which (0.4.1)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.9)
       thread_safe (~> 0.1)
     uglifier (4.2.0)
       execjs (>= 0.3.0, < 3)