This was resolved in v2.0 #120 by the decoder treating CBOR NaN and Infinity time values as if they were CBOR Null.

Also update godoc overview to point to v2.x releases and encourage projects to upgrade.

CBOR RFC 7049 specified the same tag number to allow integer and float content representing time. By comparison, MessagePack avoided float while still supporting nanosecond time resolution with their unsigned integer timestamp "tag" (extension).