Update irb 1.14.3 → 1.15.1 (minor) (#276)

Co-authored-by: depfu[bot] <23717796+depfu[bot]@users.noreply.github.com>

Gemfile.lock

@@ -27,7 +27,8 @@ GEM
     ffi (1.15.5)
     hashdiff (1.1.1)
     io-console (0.8.0)
-    irb (1.14.3)
+    irb (1.15.1)
+      pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
     json (2.9.1)
@@ -51,7 +52,10 @@ GEM
     parser (3.3.7.0)
       ast (~> 2.4.1)
       racc
-    psych (5.2.2)
+    pp (0.6.2)
+      prettyprint
+    prettyprint (0.2.0)
+    psych (5.2.3)
       date
       stringio
     public_suffix (6.0.1)
@@ -75,7 +79,7 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    rdoc (6.10.0)
+    rdoc (6.11.0)
       psych (>= 4.0.0)
     redis (5.3.0)
       redis-client (>= 0.22.0)