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Bumps [github.com/libp2p/go-libp2p](https://github.com/libp2p/go-libp2p) from 0.4.2 to 0.5.0.
- [Release notes](https://github.com/libp2p/go-libp2p/releases)
- [Changelog](https://github.com/libp2p/go-libp2p/blob/master/NEWS.md)
- [Commits](https://github.com/libp2p/go-libp2p/compare/v0.4.2...v0.5.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

1. Remove bootstrappers with small (1024 bit) keys.
2. Switch from /ipfs to /p2p multiaddrs.

part of https://github.com/libp2p/libp2p/issues/79

Bumps [github.com/libp2p/go-libp2p-core](https://github.com/libp2p/go-libp2p-core) from 0.2.5 to 0.3.0.
- [Release notes](https://github.com/libp2p/go-libp2p-core/releases)
- [Commits](https://github.com/libp2p/go-libp2p-core/compare/v0.2.5...v0.3.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-cid](https://github.com/ipfs/go-cid) from 0.0.3 to 0.0.4.
- [Release notes](https://github.com/ipfs/go-cid/releases)
- [Commits](https://github.com/ipfs/go-cid/compare/v0.0.3...v0.0.4)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Fixes a bug where we wouldn't be able to perform queries with a sparse but
non-empty routing table.

Bumps [github.com/multiformats/go-multiaddr](https://github.com/multiformats/go-multiaddr) from 0.1.2 to 0.2.0.
- [Release notes](https://github.com/multiformats/go-multiaddr/releases)
- [Commits](https://github.com/multiformats/go-multiaddr/compare/v0.1.2...v0.2.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

We'd like to be able to refresh then _wait_ for the refresh to finish in the testground DHT tests. That way, we can:

1. Start and disable _auto_ refresh.
2. Bootstrap.
3. Refresh a couple of times till we're stable.
4. Wait to _stop_ refreshing.
5. Disconnect from and forget about all peers _not_ in our routing tables.
6. Run the actual tests without interference from the bootstrapping logic.

Bumps [go.opencensus.io](https://github.com/census-instrumentation/opencensus-go) from 0.22.1 to 0.22.2.
- [Release notes](https://github.com/census-instrumentation/opencensus-go/releases)
- [Commits](https://github.com/census-instrumentation/opencensus-go/compare/v0.22.1...v0.22.2)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/ipfs/go-datastore](https://github.com/ipfs/go-datastore) from 0.1.1 to 0.3.1.
- [Release notes](https://github.com/ipfs/go-datastore/releases)
- [Commits](https://github.com/ipfs/go-datastore/compare/v0.1.1...v0.3.1)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/mr-tron/base58](https://github.com/mr-tron/base58) from 1.1.2 to 1.1.3.
- [Release notes](https://github.com/mr-tron/base58/releases)
- [Commits](https://github.com/mr-tron/base58/compare/v1.1.2...v1.1.3)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [github.com/stretchr/testify](https://github.com/stretchr/testify) from 1.3.0 to 1.4.0.
- [Release notes](https://github.com/stretchr/testify/releases)
- [Commits](https://github.com/stretchr/testify/compare/v1.3.0...v1.4.0)
Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Update deps:

* Switch to multiformats/go-base32
* Regenerate protobuf decoding code

The default timeout is 10s so this won't take that long anyways. On the
other hand, if we do this all at once, we max the swarms dial queue.

Updates the version of go-libp2p-core and go-libp2p-testing

Update msgio to latest version
Use max size in msgio readers
Fix error handling in reads

This is a -u=patch update

This was causing us to build up a bunch of background goroutines. Technically,
we should be resetting all these streams when the DHT stops. However, we don't
actually unregister stream handlers from the host so, really, nothing will
actually stop till the host stops. When it does, it'll kill all the streams
anyways.

Really deal with the deleted tag issue.

Deal with renamed tags.

Add initial set of metrics exposed via OpenCensus.

batches deletes

go-libp2p-peerstore now has a TempAddrTTL of 2 minutes

```
verifying github.com/ipfs/go-datastore@v0.0.1/go.mod: checksum mismatch
        downloaded: h1:bYmHO9fuKO1Ca7dpdDBWQl0mndy5b0HFqSJjGlNYtzs=
        go.sum:     h1:d4KVXhMt913cLBEI/PXAy6ko+W7e9AhyAKBGh803qeE=
```

```
verifying github.com/ipfs/go-datastore@v0.0.1: checksum mismatch
        downloaded: h1:u3lrOIBAhGS5prBa94V89LJNMWlEsO2+zgFlEGTl0E4=
        go.sum:     h1:AW/KZCScnBWlSb5JbnEnLKFWXL224LBEh/9KXXOrUms=
```

* Add IpfsDHT.{Bootstrap{Random,Self},Peer{Id,Key}}
* Include client mode tests, support for Ping, and uncruft setupDHTs
* Include xerrors in deps

This reverts commit 7e68ac3c.

Fixes race conditions in the tests when using go modules.