Merge pull request #2290 from ruby/dependabot/bundler/steep-1.9.4

Bump steep from 1.9.3 to 1.9.4

Author: soutaro

Gemfile.lock

@@ -128,7 +128,7 @@ GEM
     ruby-progressbar (1.13.0)
     securerandom (0.4.1)
     stackprof (0.2.27)
-    steep (1.9.3)
+    steep (1.9.4)
       activesupport (>= 5.1)
       concurrent-ruby (>= 1.1.10)
       csv (>= 3.0.9)