import { decode } from "https://deno.land/std@0.197.0/encoding/varint.ts";
Given a buf, starting at offset (default: 0), begin decoding bytes as
VarInt encoded bytes, for a maximum of 10 bytes (offset + 10). The returned
tuple is of the decoded varint 32-bit number, and the new offset with which
to continue decoding other data.
If a bigint in return is undesired, the decode32 function will return a
number, but this should only be used in cases where the varint is
assured to be 32-bits. If in doubt, use decode().
To know how many bytes the VarInt took to encode, simply negate offset
from the returned new offset.