Merge pull request #853 from ddbj/dependabot/bundler/api/json-2.9.1

Bump json from 2.9.0 to 2.9.1 in /api

Author: ursm

api/Gemfile.lock

@@ -183,7 +183,7 @@ GEM
       reline (>= 0.4.2)
     jb (0.8.2)
     jmespath (1.6.2)
-    json (2.9.0)
+    json (2.9.1)
     json-jwt (1.16.7)
       activesupport (>= 4.2)
       aes_key_wrap