Raised dependencies

[racinmat]

This allows people to use this repo with newer dependencies.
Everything should work as it does not seem to use functions or structures which are present in [email protected] but not in [email protected].
Fixes #15 .
Please, label this PR with hacktoberfest-accepted.
Thanks.

[logankilpatrick]

Thanks for this. I would suggest checking out: FluxML/fluxml.github.io#107

[logankilpatrick]

PR's to this repo will not be very impactful whereas PR's to Flux will actually help the community

[racinmat]

Thanks, I'll take a look at this issue in Flux.jl.
This PR is impactful for me, because we're using Slack.jl in our company and we need all dependencies to go through the package server. So this actually helps us.

[logankilpatrick]

😄 I never imaged people would actually use Slack.jl beyond the Julia Slack bots I had set up. Glad to hear you are using it and in that case, feel free to continue to add features!

[logankilpatrick]

Might be cool to add a showcase section in the Readme and talk about where Slack.jl is being used, feel free to open that PR

[racinmat]

We use it just to send some messages to our internal slack when some experiment errors, we basically call sendtoslack(data, some_our_url), but if it makes sense to mention in the Readme that we use this package at Avast in R&D during our experiments, I can definitely send PR.

Btw, I noticed there is yet another registered package for sending messages to slack https://github.com/Sumidu/slacker.jl which seems to be doing similar thing, but in a bit different manner. So it seems few more people have need to send things to slack from julia.