Fix keyword argument warnings in the tests from Class#new

This were previously hidden because calls from C were not warned.

test/csv/parse/test_header.rb

@@ -312,12 +312,12 @@ A
   end
 
   def test_parse_empty
-    assert_equal(CSV::Table.new([], {}),
+    assert_equal(CSV::Table.new([], **{}),
                  CSV.parse("", headers: true))
   end
 
   def test_parse_empty_line
-    assert_equal(CSV::Table.new([], {}),
+    assert_equal(CSV::Table.new([], **{}),
                  CSV.parse("\n", headers: true))
   end
 

test/csv/parse/test_rewind.rb

@@ -7,7 +7,7 @@ class TestCSVParseRewind < Test::Unit::TestCase
   extend DifferentOFS
 
   def parse(data, options={})
-    csv = CSV.new(data, options)
+    csv = CSV.new(data, **options)
     records = csv.to_a
     csv.rewind
     [records, csv.to_a]

test/logger/test_logdevice.rb

@@ -30,7 +30,7 @@ class TestLogDevice < Test::Unit::TestCase
   end
 
   def d(log, opt = {})
-    Logger::LogDevice.new(log, opt)
+    Logger::LogDevice.new(log, **opt)
   end
 
   def test_initialize

test/test_tempfile.rb

@@ -8,8 +8,8 @@ class TestTempfile < Test::Unit::TestCase
     @tempfile = nil
   end
 
-  def tempfile(*args, &block)
-    t = Tempfile.new(*args, &block)
+  def tempfile(*args, **kw, &block)
+    t = Tempfile.new(*args, **kw, &block)
     @tempfile = (t unless block)
   end