Merge pull request #2164 from ruby/dependabot/bundler/tempfile-0.3.1

Bump tempfile from 0.2.1 to 0.3.1

Author: soutaro

Gemfile.lock

@@ -140,7 +140,7 @@ GEM
     stringio (3.1.2)
     strong_json (2.1.2)
     strscan (3.1.2)
-    tempfile (0.2.1)
+    tempfile (0.3.1)
     terminal-table (3.0.2)
       unicode-display_width (>= 1.1.1, < 3)
     test-unit (3.6.5)