Merge pull request #270 from ruby-i18n/dependabot/bundler/psych-5.2.1

Bump psych from 5.2.0 to 5.2.1

Author: movermeyer

Gemfile.lock

@@ -8,6 +8,7 @@ GEM
     builder (3.3.0)
     coderay (1.1.3)
     concurrent-ruby (1.3.4)
+    date (3.4.1)
     debug (1.9.2)
       irb (~> 1.10)
       reline (>= 0.3.8)
@@ -84,7 +85,8 @@ GEM
       method_source (~> 1.0)
     pry-nav (1.0.0)
       pry (>= 0.9.10, < 0.15)
-    psych (5.2.0)
+    psych (5.2.1)
+      date
       stringio
     racc (1.8.1)
     rack (2.2.10)