Use mimemagic v0.3.7 for fake gem since it does not exist

We don't want to mix things up with the real gem so it seems better for
us to choose a gem version number that does not exist.

Gemfile

@@ -277,7 +277,7 @@ gem 'charlock_holmes', '~> 0.7.7'
 gem 'ruby-magic', '~> 0.3'
 
 # Fake version of the gem to trick bundler
-gem 'mimemagic', '0.3.5', path: 'vendor/shims/mimemagic', require: false
+gem 'mimemagic', '0.3.7', path: 'vendor/shims/mimemagic', require: false
 
 # Faster blank
 gem 'fast_blank'

Gemfile.lock

 PATH
   remote: vendor/shims/mimemagic
   specs:
-    mimemagic (0.3.5)
+    mimemagic (0.3.7)
 
 GEM
   remote: https://rubygems.org/
@@ -1486,7 +1486,7 @@ DEPENDENCIES
   marginalia (~> 1.10.0)
   memory_profiler (~> 0.9)
   method_source (~> 1.0)
-  mimemagic (= 0.3.5)!
+  mimemagic (= 0.3.7)!
   mini_magick (~> 4.10.1)
   minitest (~> 5.11.0)
   multi_json (~> 1.14.1)

vendor/shims/mimemagic/lib/mimemagic/version.rb

 module MimeMagic
-  VERSION = "0.3.5"
+  VERSION = "0.3.7"
 end