Merge pull request #654 from coderdojo-japan/dependabot/bundler/memoist-0.16.2

Bump memoist from 0.16.1 to 0.16.2

Author: yasulab

Gemfile.lock

@@ -191,7 +191,7 @@ GEM
       nokogiri (>= 1.5.9)
     mail (2.7.1)
       mini_mime (>= 0.1.1)
-    memoist (0.16.1)
+    memoist (0.16.2)
     memory_profiler (0.9.14)
     method_source (0.9.2)
     mime-types (3.3)