Convert CipherString to a string before passing to AR (#69)

Without this our data ends up as a raw object in the db.
Only tested on my end with keepass

Should fix #64 and #59

tools/1password_import.rb

@@ -79,7 +79,7 @@ def usage
   Bitwarden::KDF::TYPES[@u.kdf_type], @u.kdf_iterations)
 
 def encrypt(str)
-  @u.encrypt_data_with_master_password_key(str, @master_key)
+  @u.encrypt_data_with_master_password_key(str, @master_key).to_s
 end
 
 to_save = {}

tools/bitwarden_import.rb

@@ -35,7 +35,7 @@ def usage
 end
 
 def encrypt(str)
-  @u.encrypt_data_with_master_password_key(str, @master_key)
+  @u.encrypt_data_with_master_password_key(str, @master_key).to_s
 end
 
 def get_or_create_folder_uuid(str)

tools/keepass_import.rb

@@ -91,7 +91,7 @@ def usage
 end
 
 def encrypt(str)
-  @u.encrypt_data_with_master_password_key(str, @master_key)
+  @u.encrypt_data_with_master_password_key(str, @master_key).to_s
 end
 
 def get_or_create_folder_uuid(str)

tools/lastpass_import.rb

@@ -86,7 +86,7 @@ def usage
 end
 
 def encrypt(str)
-  @u.encrypt_data_with_master_password_key(str, @master_key)
+  @u.encrypt_data_with_master_password_key(str, @master_key).to_s
 end
 
 def get_or_create_folder_uuid(str)