Parse version from changelog written in RST format.

def getVersion(data):
    """
    Parse version from changelog written in RST format.
    """
    data = data.splitlines()
    return next((
        v
        for v, u in zip(data, data[1:])  # v = version, u = underline
        if len(v) == len(u) and allSame(u) and hasDigit(v) and "." in v
    ))