Fix Style/OptionalBooleanParameter Rubocop offences.

Author: hainesr

.rubocop_todo.yml

@@ -37,10 +37,3 @@ Style/FileRead:
     - 'test/models/zip/bzip2/decompress_test.rb'
     - 'test/models/zip/bzip2/decompressor_test.rb'
     - 'test/models/zip/bzip2/libbz2_test.rb'
-
-# Offense count: 1
-# Configuration parameters: AllowedMethods.
-# AllowedMethods: respond_to_missing?
-Style/OptionalBooleanParameter:
-  Exclude:
-    - 'lib/zip/bzip2/libbz2.rb'

lib/zip/bzip2/decompress.rb

@@ -11,7 +11,7 @@ def initialize(options = {})
         small = options[:small]
 
         @libbz2 = Libbz2.new.tap do |libbz2|
-          libbz2.decompress_init!(small)
+          libbz2.decompress_init!(small: small)
         end
 
         @finished = false

lib/zip/bzip2/libbz2.rb

@@ -27,7 +27,7 @@ def initialize
         @stream = FFI::Libbz2::BzStream.new
       end
 
-      def decompress_init!(small = false)
+      def decompress_init!(small: false)
         result = FFI::Libbz2::BZ2_bzDecompressInit(@stream, 0, small ? 1 : 0)
         check_error(result)