Remove suppress_deprecations behavior

`suppress_deprecations` options is no more required, because the
ActiveSupport::Deprecation#behavior can be configured as an array, and
accepts an array of Behaviors to handle the deprecation warning

https://api.rubyonrails.org/classes/ActiveSupport/Deprecation/Behavior.html#method-i-behavior-3D

lib/deprecations_detector/main.rb

@@ -4,7 +4,7 @@ module DeprecationsDetector
   class Main
     include Singleton
 
-    attr_reader :coverage_matrix, :deprecation_matrix, :suppress_deprecations
+    attr_reader :coverage_matrix, :deprecation_matrix
     attr_accessor :config, :output_path
 
     def initialize
@@ -51,9 +51,7 @@ def add_deprecation(message, callstack)
       @deprecation_matrix[file_path][result[2].to_i - 1] = message
     end
 
-    def start(suppress_deprecations: false)
-      @suppress_deprecations = suppress_deprecations
-
+    def start
       @coverage_matrix = {}
       @deprecation_matrix = {}
     end

spec/faked_project/lib/faked_project/some_class.rb

@@ -9,7 +9,9 @@ def initialize(label)
   end
 
   def reverse
-    ActiveSupport::Deprecation.warn('My Deprecation')
+    deprecator = ActiveSupport::Deprecation.new
+    deprecator.behavior = DeprecationsDetector::Collect
+    deprecator.warn('My Deprecation')
 
     label.reverse
   end