Fix Style/OptionalBooleanParameter cop in `Entry`.

Just an internal API so safe, and makes things a lot neater.

.rubocop_todo.yml

@@ -109,7 +109,6 @@ Style/NumericPredicate:
 # AllowedMethods: respond_to_missing?
 Style/OptionalBooleanParameter:
   Exclude:
-    - 'lib/zip/entry.rb'
     - 'lib/zip/file.rb'
     - 'lib/zip/file_split.rb'
     - 'lib/zip/output_stream.rb'

lib/zip/entry.rb

@@ -333,7 +333,7 @@ module Zip
        @extra ? @extra.local_size : 0].pack('VvvvvvVVVvv')
     end
 
-    def write_local_entry(io, rewrite = false) #:nodoc:all
+    def write_local_entry(io, rewrite: false) #:nodoc:all
       prep_zip64_extra(true)
       verify_local_header_size! if rewrite
       @local_header_offset = io.tell

lib/zip/output_stream.rb

@@ -177,7 +177,7 @@ module Zip
       pos = @output_stream.pos
       @entry_set.each do |entry|
         @output_stream.pos = entry.local_header_offset
-        entry.write_local_entry(@output_stream, true)
+        entry.write_local_entry(@output_stream, rewrite: true)
       end
       @output_stream.pos = pos
     end

test/local_entry_test.rb

@@ -126,7 +126,7 @@ class ZipLocalEntryTest < MiniTest::Test
     buf2 = StringIO.new
     entry.size = 0x123456789ABCDEF0
     entry.compressed_size = 0x0123456789ABCDEF
-    entry.write_local_entry(buf2, true)
+    entry.write_local_entry(buf2, rewrite: true)
     refute_nil(entry.extra['Zip64'])
     refute_equal(buf1.size, 0)
     assert_equal(buf1.size, buf2.size) # it can't grow, or we'd clobber file data