Fix typo, occured -> occurred

Bump relx to 3.22.4

Typo: seperate -> separate

- [OSX tests added to CI](https://github.com/erlang/rebar3/pull/1471),
joining linux and windows 10
- [upgrade relx to 3.22.3](https://github.com/erlang/rebar3/pull/1518),
[fixing multiple
issues](https://github.com/erlware/relx/releases/tag/v3.22.3)
- [Fixing eunit errors in 19.3 when `init_per_*` isn't paired with
`end_per_*`](https://github.com/erlang/rebar3/pull/1516)
- [Allow single test spec in
ct_opts](https://github.com/erlang/rebar3/pull/1506)
- [Properly warn when missing inets at
runtime](https://github.com/erlang/rebar3/pull/1505)
- [rebar_utils:escape_chars handles quotes in
paths](https://github.com/erlang/rebar3/pull/1504)
- [Fix typo in help text for upgrade
command](https://github.com/erlang/rebar3/pull/1503)
- [change package version warnings to debug
level](https://github.com/erlang/rebar3/pull/1502)
- [Path-type sensitive .cmd creation for
escripts](https://github.com/erlang/rebar3/pull/1500)
- [Windows escripts get cmd
autogenerated](https://github.com/erlang/rebar3/pull/1494)
- [REBAR_CONFIG impacts config file for project root
only](https://github.com/erlang/rebar3/pull/1497)
- [Fix wildcard usage in rebar3
clean](https://github.com/erlang/rebar3/pull/1498)
- [Bump cth_readable to
1.2.4](https://github.com/erlang/rebar3/pull/1496) (fixing some
erroneous reports when suites get skipped)
- [Add respect for src_dirs option in app_discover and
app_info](https://github.com/erlang/rebar3/pull/1486)
- [Add support for global plugin-defined
templates](https://github.com/erlang/rebar3/pull/1473)
- [catch badarg exception from eunit in
`rebar_prv_eunit`](https://github.com/erlang/rebar3/pull/1472)

update travis.yml to test on osx

upgrade relx to 3.22.3

eunit in 19.3 errors if `init_per_*` isn't paired with `end_per_*`

minor fix: name of internal function

Revert "List 'lock' command in man page"

List 'lock' command in man page

Allow single test spec in ct_opts

The option {spec,Specs} is allowed in ct_opts, but
rebar_prv_common_test:test_dirs did not take into account that Specs
could also be a string only, i.e. not a list of strings.

Properly warn on missing rebar3 deps: add inets

rebar_utils:escape_chars handles quotes

rebar_file_utils:cp_r uses rebar_utils:escape_chars to ensure that the file names are safe to use, but it doesn't escape double and single quotes. If the file name includes those characters, they disappear when the shell processes them and we get "file not found" errors.

The main culprit here is eunit, that creates reports whose names are `TEST-file_"myfile.app".xml`, and I wish it didn't but I think escape_chars should still do its job all the way.

Fix typo in help text for upagrde command

change package version warning to debug

Path-type sensitive .cmd creation

Windows escripts get cmd autogenerated

More fixes for bad calls to find_apps

REBAR_CONFIG impacts file project root only

Fix wildcard usage in rebar3 clean

The wildcard usage could fail on some OSes by being passed directly and
just not finding libs and erroring out

Bump cth_readable to 1.2.4

Fixes an issue where some skipped test suites could end up misreported
as the previous suite. See
https://github.com/ferd/cth_readable/issues/10

Add respect for src_dirs option in app_discover and app_info

This also patches up a problem for hooks when dealing with directories
with spaces in them, and reduces complexity of bootstrap file.

The finding of the file was done based on an assumed 'src' path which
may not be correct. This patch instead replaces the value with a lookup
in configured paths and returns the first that matches to an existing
file.

First find the rebar.config file, and if any data is found, check for
src_dirs config. If nothing is there or no app is found, default to src/

This makes rebar_prv_install_deps able to support more src_dir configs