Revert "Bump rdoc from 6.2.0 to 6.2.1"

znz · znz · commit e246d606cd49 · 2019-12-31T20:23:47.000+09:00
This reverts commit 4e26dfc. Try to fix deploy failure ``` bundle stdout: rdoc-6.2.1 requires ruby version >= 2.4.0, which is incompatible with the current version, ruby 2.3.3p222 bundle stderr: Nothing written ```
diff --git a/Gemfile.lock b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
       net-ssh (>= 2.6.5, < 6.0.0)
     net-ssh (5.2.0)
     rake (13.0.1)
-    rdoc (6.2.1)
+    rdoc (6.2.0)
     sshkit (1.20.0)
       net-scp (>= 1.1.2)
       net-ssh (>= 2.8.0)
