Fix keyword arguments warnings on Ruby 2.7 (Sorcery#241)

* CI against Ruby 2.7

* Fix keyword arguments warnings on Ruby 2.7

It fixes codes to match method signatures in rails and bcrypt.

## See also

- https://github.com/rails/rails/blob/v6.0.3/activerecord/lib/active_record/persistence.rb#L469
- https://github.com/rails/rails/blob/v6.0.3/activemodel/lib/active_model/callbacks.rb
- https://github.com/codahale/bcrypt-ruby/blob/v3.1.13/lib/bcrypt/password.rb#L43

* Update CHANGELOG.md

Co-authored-by: Josh Buker <[email protected]>

.travis.yml

@@ -3,6 +3,7 @@ rvm:
   - 2.4.9
   - 2.5.7
   - 2.6.5
+  - 2.7.1
 
 gemfile:
   - Gemfile

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 ## HEAD
 
+* Fix ruby 2.7 deprecation warnings [#241](https://github.com/Sorcery/sorcery/pull/241)
+
 ## 0.15.0
 
 * Fix brute force vuln due to callbacks no being ran [#235](https://github.com/Sorcery/sorcery/pull/235)

lib/sorcery/adapters/active_record_adapter.rb

@@ -12,7 +12,7 @@ def update_attributes(attrs)
 
       def save(options = {})
         mthd = options.delete(:raise_on_failure) ? :save! : :save
-        @model.send(mthd, options)
+        @model.send(mthd, **options)
       end
 
       def increment(field)
@@ -35,7 +35,7 @@ def define_field(name, type, options = {})
         end
 
         def define_callback(time, event, method_name, options = {})
-          @klass.send "#{time}_#{event}", method_name, options.slice(:if, :on)
+          @klass.send "#{time}_#{event}", method_name, **options.slice(:if, :on)
         end
 
         def find_by_oauth_credentials(provider, uid)

spec/shared_examples/user_shared_examples.rb

@@ -511,7 +511,7 @@ def self.matches?(crypted, *tokens)
 
       # password comparison is done using BCrypt::Password#==(raw_token), not String#==
       bcrypt_password = BCrypt::Password.new(user.crypted_password)
-      allow(::BCrypt::Password).to receive(:create) do |token, cost:|
+      allow(::BCrypt::Password).to receive(:create) do |token, options = {}|
         # need to use common BCrypt's salt when genarating BCrypt::Password objects
         # so that any generated password hashes can be compared each other
         ::BCrypt::Engine.hash_secret(token, bcrypt_password.salt)
@@ -535,7 +535,7 @@ def self.matches?(crypted, *tokens)
 
       # password comparison is done using BCrypt::Password#==(raw_token), not String#==
       bcrypt_password = BCrypt::Password.new(user.crypted_password)
-      allow(::BCrypt::Password).to receive(:create) do |token, cost:|
+      allow(::BCrypt::Password).to receive(:create) do |token, options = {}|
         # need to use common BCrypt's salt when genarating BCrypt::Password objects
         # so that any generated password hashes can be compared each other
         ::BCrypt::Engine.hash_secret(token, bcrypt_password.salt)