Update readable-stream

[tpluscode]

Currently the different parser and serialiser packages refer to incompatible versions of readable-stream 2.x and 3.x

Here's npm ls readable-stream --prod from alcaeus

alcaeus@1.0.0-alpha.16 /Users/tomaszpluskiewicz/projects/github/wikibus/heracles
├─┬ @rdfjs/formats-common@2.1.0
│ ├─┬ @rdfjs/parser-jsonld@1.2.0
│ │ ├─┬ concat-stream@1.6.2
│ │ │ └── readable-stream@2.3.7
│ │ └── readable-stream@2.3.7
│ ├─┬ @rdfjs/parser-n3@1.1.3
│ │ └── readable-stream@2.3.7
│ ├─┬ @rdfjs/serializer-jsonld@1.2.1
│ │ └── readable-stream@2.3.7
│ └─┬ @rdfjs/serializer-ntriples@1.0.3
│   └─┬ readable-to-readable@0.1.3
│     └── readable-stream@3.6.0  deduped
├─┬ rdf-dataset-indexed@0.4.0
│ └── readable-stream@3.6.0  deduped
├─┬ rdf-transform-triple-to-quad@1.0.2
│ └── readable-stream@3.6.0  deduped
└── readable-stream@3.6.0

I create this issue to track PRs which will update the dependencies' dependencies to have a single resolution of readable-stream@^3

[bergos]

All @rdfjs packages have been updated. Only n3 still depends on 3.x of readable-stream. I opened an issue to publish a new release. Until there is a new release, it's possible to use overrides like here. As there is a workaround and an open issue in the n3 package, I will close this issue.