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/json_ld/identity.rb

@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # frozen_string_literal: true
 # This file generated automatically from http://w3id.org/identity/v1
 require 'json/ld'

lib/json_ld/security.rb

@@ -1,4 +1,3 @@
-# -*- encoding: utf-8 -*-
 # frozen_string_literal: true
 # This file generated automatically from http://w3id.org/security/v1
 require 'json/ld'