Fix security issues

- Remove the `rack` dependency, since we don't really need it.
- Fix polynomial regex and preserve the same logic

Gemfile

@@ -8,4 +8,3 @@ gem 'pry-rescue'
 
 # required for CircleCI to build properly with ruby 1.9.3
 gem 'json', '~> 1.8.3'
-gem 'rack', '~> 1.6.4'

lib/netsuite/utilities.rb

@@ -196,7 +196,9 @@ def find_record(record, names, opts = {})
         end
 
         # sniff for an email-like input; useful for employee/customer searches
-        if !field_name && /@.*\./ =~ name
+        if !field_name &&
+            name.include?('@') &&
+            name.split('@')[1..].any? { _1.include?('.') }
           field_name = 'email'
         end