Maintenance: Update dependency koala to v3.4.0

Gemfile.lock

@@ -261,7 +261,7 @@ GEM
     json (2.6.3)
     jwt (2.3.0)
     kgio (2.11.4)
-    koala (3.3.0)
+    koala (3.4.0)
       addressable
       faraday
       faraday-multipart
@@ -380,7 +380,7 @@ GEM
     pry-stack_explorer (0.6.1)
       binding_of_caller (~> 1.0)
       pry (~> 0.13)
-    public_suffix (5.0.0)
+    public_suffix (5.0.1)
     puma (4.3.12)
       nio4r (~> 2.0)
     pundit (2.3.0)