Add --without-docs option for publish task

[starbelly]

• Add a --without-docs option for the publish task which defaults to false. If switched on, will only publish a package regardless of configuration.

[starbelly]

Logic is sound.

Would it make sense to have it as --with-docs=true|false and defaulting to true, so that instead of writing --without-docs=true you just write --with-docs=false (or maybe even just --docs)

We could go that route, but you don't have to specify --without-docs=true, just --without-docs. The idea being you'll only ever use that switch if you want it on. Does that make sense?

Edit:

Example output:

===> Analyzing applications...
===> Compiling rebar3_hex
===> Analyzing applications...
===> Compiling rebar3_hex
===> Verifying dependencies...
Publishing truecoat 0.42.42 to hexpm
  Description: It gets installed at the factory
  Dependencies:

  Included files:
    CHANGELOG.md
    LICENSE
    README.md
    rebar.config
    rebar.lock
    src/truecoat.app.src
    src/truecoat.erl
  Licenses: Apache 2.0
  Links:

  Build tools: rebar3
Be aware, you are publishing to the public Hexpm repository.
Before publishing, please read Hex CoC: https://hex.pm/policies/codeofconduct
Proceed? ("Y")> y
Local Password:
===> Published truecoat 0.42.42
===> --without-docs is enabled : will not publish docs

[ferd]

Yeah that's fine too