Fixes block and proc definition to work with Ruby 3.0.0 (#392)

CHANGELOG.md

@@ -1,4 +1,5 @@
 ## master (unreleased)
+  - Fixes block and proc definition to work with Ruby 3.0.0 [@csalvato] - [#392]
   - Removed check for Ruby 2.4 and earlier [@bryanh]
 	- Rails 5.0 builds are failing, because the sqlite3 version being installed is wrong version [#366]
   - Fixes spec suite to properly work via travis, gets a clean build [@imajes, others]

lib/awesome_print/formatters/base_formatter.rb

@@ -109,8 +109,8 @@ module AwesomePrint
         inspector.current_indentation
       end
 
-      def indented
-        inspector.increase_indentation(&Proc.new)
+      def indented(&block)
+        inspector.increase_indentation(&block)
       end
 
       def indent

lib/awesome_print/inspector.rb

@@ -62,8 +62,8 @@ module AwesomePrint
       indentator.indentation
     end
 
-    def increase_indentation
-      indentator.indent(&Proc.new)
+    def increase_indentation(&block)
+      indentator.indent(&block)
     end
 
     # Dispatcher that detects data nesting and invokes object-aware formatter.