colon at the end of link with numbers does not correctly parse

[Amzd]

test123.com:

expected:

[
    {
        "t": "Link",
        "c": {
            "destination": {
                "target": "test123.com",
                "hostname": "test123.com"
            }
        }
    },
    {
        "t": "Text",
        "c": ":"
    },
    {
        "t": "Linebreak"
    }
]

actual:

[
    {
        "t": "Text",
        "c": "test"
    },
    {
        "t": "Link",
        "c": {
            "destination": {
                "target": "123.com",
                "hostname": "123.com:",
                "punycode": {
                    "original_hostname": "123.com:",
                    "ascii_hostname": "123.xn--com:-",
                    "punycode_encoded_url": "123.com"
                }
            }
        }
    },
    {
        "t": "Text",
        "c": ":"
    },
    {
        "t": "Linebreak"
    }
]

[Simon-Laux]

looks similar to #90, but this is a distinct bug that surprises me, numbers in hostname are a really basic feature