The code example for using IPFS as a library doesn't run unless indirect dependencies are updated:
```
$ go version
go version go1.17 linux/amd64
$ uname -a
Linux home 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 (2021-07-18) x86_64 GNU/Linux
$ go run main.go
go: github.com/ipfs/go-ipfs@v0.9.1 requires
github.com/ipfs/go-bitswap@v0.4.0: missing go.sum entry; to add it:
go mod download github.com/ipfs/go-bitswap
go: github.com/ipfs/go-ipfs@v0.9.1 requires
github.com/ipfs/go-bitswap@v0.4.0: missing go.sum entry; to add it:
go mod download github.com/ipfs/go-bitswap
```
Remedied by:
```
$ go mod tidy
$ go run main.go
-- Getting an IPFS node running --
Spawning node on a temporary repo
...
```
Also, require go version 1.16, otherwise, example can fail under go
1.15 with errors like:
```
go build github.com/lucas-clemente/quic-go/internal/qtls:
build constraints exclude all Go files in
/home/jbouwman/go/pkg/mod/github.com/lucas-clemente/quic-go@v0.23.0/internal/qtls
```
