Dialer.connectToPeer fails badly if no addrs

[dthorpe]

Version: package.json version or the commit you have installed.
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Subsystem: if known, please specify affected core module name (e.g Transports, SECIO, etc).

If possible, please provide code that demonstrates the problem, keeping it as
simple and free of external dependencies as you are able.
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• Version: 0.28.2
• Platform: Darwin Kernel Version 17.7.0: Wed May 27 17:00:02 PDT 2020; root:xnu-4570.71.80.1~1/RELEASE_X86_64 x86_64
• Subsystem: libp2p/dialer

Type: Bug

Severity: Medium

Description:

calling Dialer.connectToPeer with a peer that has no addresses fails with

Unhandled Rejection (TypeError): Cannot read property 'length' of undefined

Steps to reproduce the error:

const peer = new PeerId(Buffer.from("QmfEa1LrSt2R7KiZ31yPo3TT8ipfyDfrMRkaQix3rcXXXX"))
await dialer.connectToPeer(peer)

[jacobheun]

Fixed by #715