Update steep

Author: soutaro

Gemfile.lock

@@ -122,7 +122,7 @@ GEM
     ruby-progressbar (1.13.0)
     securerandom (0.4.1)
     stackprof (0.2.26)
-    steep (1.9.2)
+    steep (1.9.3)
       activesupport (>= 5.1)
       concurrent-ruby (>= 1.1.10)
       csv (>= 3.0.9)
@@ -133,7 +133,7 @@ GEM
       logger (>= 1.3.0)
       parser (>= 3.1)
       rainbow (>= 2.2.2, < 4.0)
-      rbs (~> 3.7.0)
+      rbs (~> 3.8)
       securerandom (>= 0.1)
       strscan (>= 1.0.0)
       terminal-table (>= 2, < 4)