feat(gems): update rack to 2.1.3

Author: bethesque

packaging/Gemfile.lock

@@ -63,7 +63,7 @@ GEM
       table_print (~> 1.5)
       term-ansicolor
       thor (~> 0.20)
-    rack (2.1.2)
+    rack (2.1.3)
     rack-proxy (0.6.5)
       rack
     rack-reverse-proxy (0.12.0)