* updates bitswap to include _many_ perf enhancements and bug fixes.
* updates go-fs-lock because the version here is pretty old.
* updates go-libp2p
* updates bbloom _just_ in case, because the version we were depending on had bugs (looks like we're not actually using it).
We were ignoring quite a few error cases, and had one case where we weren't
actually updating state where we wanted to. Unfortunately, if the linter doesn't
pass, nobody has any reason to actually check lint failures in CI.
There are three remaining XXXs marked in the code for lint.
This configurability is unlocked through the `testground`
build tag, which Project Oni will uses.
Changes in the usage places of these relaxed constants
were required due to the fact that Golang constants are
untyped, but vars aren't.
Read https://blog.golang.org/constants for more info.
