title: UnicodeEncodeError when trying to export dynamo db table and write to csv file
body: <blockquote>
    <p>C:\Users\nishkumari\Desktop>export-dynamodb -t user-prods -f csv -o user-prods.csv
    export dynamodb: user-prods
    Connecting to AWS DynamoDb
    Downloading 2812 records ..... 100%
    Total downloaded records: 2812
    Writing to csv file.
    Traceback (most recent call last):
      File "C:\Users\nishkumari\AppData\Local\Programs\Python\Python37-32\Scripts\export-dynamodb-script.py", line 11, in 
        load_entry_point('export-dynamodb==2.2.1', 'console_scripts', 'export-dynamodb')()
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\click\core.py", line 722, in <strong>call</strong>
        return self.main(*args, **kwargs)
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\click\core.py", line 697, in main
        rv = self.invoke(ctx)
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\click\core.py", line 895, in invoke
        return ctx.invoke(self.callback, **ctx.params)
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\click\core.py", line 535, in invoke
        return callback(*args, **kwargs)
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\exportdynamodb\entrypoints\main.py", line 28, in main
        write_to_csv_file(data, output_filename)
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\site-packages\exportdynamodb\entrypoints\main.py", line 136, in write_to_csv_file
        writer.writerows(data['items'])
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\csv.py", line 158, in writerows
        return self.writer.writerows(map(self._dict_to_list, rowdicts))
      File "c:\users\nishkumari\appdata\local\programs\python\python37-32\lib\encodings\cp1252.py", line 19, in encode
        return codecs.charmap_encode(input,self.errors,encoding_table)[0]
    UnicodeEncodeError: 'charmap' codec can't encode characters in position 108-109: character maps to </p>
  </blockquote>