sigmet: Get SIGMETs

curl 'https://www.aviationweather.gov/api/data/sigmet?format=raw'

import requests

resp = requests.get(
    "https://www.aviationweather.gov/api/data/sigmet",
    params={
        'format': 'raw',
    },
)
data = resp.json()

import zingu_apis

api = zingu_apis.api("aviationweather")
result = api.fetch("api/data/sigmet", format="raw")

for item in result:
    print(item)

const resp = await fetch("https://www.aviationweather.gov/api/data/sigmet?format=raw");
const data = await resp.json();