Any library that will parse curl options?

Elixir has OptionParser built in but I just wanted it to use it to parse a curl request copied from a browser:

"""
curl 'https://forum.elixirforum.com/c/questions-help/53' \
-H 'Accept-Language: en-US,en;q=0.5' \
-H 'Accept-Encoding: gzip, deflate, br' \
-H 'DNT: 1' \
-H 'Upgrade-Insecure-Requests: 1' \
-H 'Sec-Fetch-Dest: document' \
-H 'Sec-Fetch-Mode: navigate' \
-H 'Sec-Fetch-Site: none' \
-H 'Sec-Fetch-User: ?1' \
-H 'Connection: keep-alive' \
-H 'User-Agent: Mozilla/5.0' \
-H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9'
"""
|> OptionParser.split()
|> Enum.drop(2)
|> OptionParser.parse(aliases: [H: :header], strict: [header: :string])

{[header: "Accept: text/html,application/xhtml+xml,application/xml;q=0.9\n"], [], []}

and it only gives me the last header, if this is a keyword list I would expect to have all the headers - are there any alternatives ?