gx: update base32

[Stebalien]

Depends on:

• https://github.com/multiformats/go-multibase/pull/17
• https://github.com/ipfs/go-cid/pull/32
• https://github.com/libp2p/go-testutil/pull/11
• https://github.com/libp2p/go-libp2p-conn/pull/14
• https://github.com/libp2p/go-libp2p-connmgr/pull/4
• https://github.com/libp2p/go-libp2p-host/pull/7
• https://github.com/libp2p/go-libp2p-swarm/pull/31
• https://github.com/libp2p/go-libp2p-netutil/pull/10
• https://github.com/libp2p/go-libp2p-blankhost/pull/4
• https://github.com/libp2p/go-libp2p-circuit/pull/13
• https://github.com/libp2p/go-libp2p/pull/220
• https://github.com/libp2p/go-libp2p-kbucket/pull/12
• https://github.com/libp2p/go-libp2p-routing/pull/16
• https://github.com/libp2p/go-libp2p-kad-dht/pull/84
• https://github.com/libp2p/go-floodsub/pull/32
• https://github.com/ipfs/go-block-format/pull/7

This PR with gx updates has been created using gx-workspace: https://github.com/ipfs/gx-workspace