Add open for composed transcodingstreams

[jakobnissen]

This allows users to easily chain codecs using the do-syntax. Here is an example where the input is chained through four different streams.

julia> using CodecZlib, TranscodingStreams
julia> open(
i -> first(read(i, String), 10),
GzipDecompressorStream ∘ NoopStream ∘ GzipCompressorStream ∘ NoopStream,
"Project.toml"
)
"name = \"Tr"

[jakobnissen]

I'll add tests if anyone with the permission to merge gives me the thumbs-up :)

[mkitti]

Could you add a comment about what this does?

[mkitti]

Please add tests

[ViralBShah]

@jakobnissen If helpful and if you are interested, I can give you commit access here.

[mkitti]

This still needs a test.

[ViralBShah]

This still needs a test.

Agree.