Fixed code quality issues (#15541)

* Added .deepsource.toml

* Removed bad use of `alias`

* Fixed operand order in the binary expression

* Prefixed unused method arguments with an underscore

* Replaced the old OpenSSL algorithmic constants with the newer strings initializers.

* Removed unnecessary UTF-8 encoding comment

lib/mastodon/email_domain_blocks_cli.rb

@@ -113,7 +113,7 @@ module Mastodon
         result = entry.destroy
 
         if result
-          processed += 1 + children_count
+          processed += children_count + 1
         else
           say("#{domain} could not be unblocked.", :red)
           failed += 1