dep: update bitswap

fixes a bunch of lock contention.

dep: update deps

Fixes some unsafe uses of the "unsafe" package.

fixes a long-standing race condition

* Swarm: fixes data race.
* Datastore: make delete idempotent.

Update go-libp2p, fix tests with weak RSA keys

"identity" is the official name

We can no longer test this with bad keys. Unfortunately, good keys will likely
contain a newline and we have no way to send such keys to the server due to how
API requests are formatted.

dep: update blockstore + bbloom

Fixes several unsafety issues. Works towards #4485.

build: fix build on go 1.13

fixes #6603

cmds/refs: fix ipfs refs for sharded directories

fixes #6596

switch from ARC cache to a 2Q cache

fixes #6590 (potential non-OSS patent issue)

fix: spammy mock when testing

docker: update the docker image

* Explicitly switch to buster.
* Explicitly set the golang version (and use the latest patch release).
* Explicitly set the busybox version.
* Update the maintainer

github: update question template to avoid click throughs

github/action: actually run the action and fork it for security

github/action: add an auto assign action

ci: spit out junit reports from the interop tests