Fix typos [ci skip] (#224)

Author: nobu

test/csv/parse/test_convert.rb

@@ -43,7 +43,7 @@ def test_integer_float
                  @parser.shift)
   end
 
-  def test_numberic
+  def test_numeric
     @parser.convert(:numeric)
     assert_equal(["Numbers", ":integer", 1, ":float", 3.015],
                  @parser.shift)

test/csv/test_table.rb

@@ -20,7 +20,7 @@ def setup
     @header_only_table = CSV::Table.new([], headers: %w{A B C})
   end
 
-  def test_initialze
+  def test_initialize
     assert_not_nil(@table)
     assert_instance_of(CSV::Table, @table)
   end