Fix bugs/race conditions in shell

Unsure if this should be a final supported format or if we should
support other ways to match instead.

This is a demo to solve the issue hilighted in
https://github.com/erlang/rebar3/pull/1072

By default, the dependency only handled versioned packages and top-level
source dependencies, and locks were being ignored.

This patch makes it so locks and package deps are being considered,
generating full-blown path lists.

Should fix #1117

Following suggestions from @psyeugenic, this code terminates and waits
for the termination of the port handling IO before booting our own,
which should get rid of annoying warnings.

We also allow for the failure to shutdown the user worker under
kernel_sup, since it is likely not there anymore in many scenarios,
preventing crashes.

Allows overwrite the default cache directory using the environment
variable REBAR_CACHE_DIR.

pass loglevel used in rebar3 to relx

make omar happy

add definition of 'COMMON_TEST' macro to eunit provider

This reverts commit 4c32c52b55.

upgrade cth_readable

define the 'EUNIT' macro in the test profile

move dialyze setting of debug_info to overrides in profile

bump certifi to 0.4.0

latest mozilla bundles

include project_plugins in plugins that can be upgraded

Take CT options errors and turn them to warnings

The idea is that given we accept arbitrary config items for CT, we
should similarly be able to pass unsupported options and keep things
running.

However for unsupported options, a warning is very useful to have.

Fix quoting problem in zsh completion

add support for common tests `include` flag

error on a cover spec in ct_opts

Add short-options to the eunit provider.

This patch adds support for short options in the eunit provider.

Run all hooks

fix auto-registry update to work even when not a locked pkg-vsn

Bump cth_readable

Fixed rebar.config shell_apps setting

Hex improvements

add project_providers after initing default providers but allow overrides

Add me to THANKS for suffering through Tristan's code