Bump mimemagic

The previous version of this was yanked.

Author: sihugh

Gemfile.lock

@@ -174,7 +174,7 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2021.0225)
-    mimemagic (0.3.5)
+    mimemagic (0.3.6)
     mini_magick (4.10.1)
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)